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Why Is My Furnace Blowing Cold Air Instead of Heat in Big Bear, CA?

Posted on January 15, 2025 5:30 AM by Bear Valley Plumbing & Heating

If your furnace is blowing cold air instead of heat, it can be a sign of various issues, ranging from a simple thermostat error to more complex mechanical problems. Common reasons include incorrect thermostat settings, clogged air filters, pilot light issues, or malfunctioning components. Addressing these issues promptly ensures your home stays warm and your furnace operates efficiently.

At Bear Valley Plumbing & Heating, we’ve helped countless Big Bear homeowners resolve furnace problems quickly and effectively. In this article, we’ll explore the possible causes of a furnace blowing cold air, how to troubleshoot the issue, and when to call a professional.

 

What Are the Most Common Reasons a Furnace Blows Cold Air?

  1. Incorrect Thermostat Settings
    If your furnace is blowing cold air, check the thermostat first.
    Solution: Ensure the thermostat is set to “Heat” mode and that the temperature is above the current room temperature.
    Common Error: A thermostat set to “Fan Only” will circulate air without heating it.
  2. Clogged Air Filters
    Dirty air filters can block airflow, causing the furnace to overheat and trigger a safety shutdown.
    Solution: Replace or clean your air filters every 1–3 months.
  3. Pilot Light or Ignition Problems
    If the pilot light or ignition system fails, the furnace won’t produce heat.
    Solution: Relight the pilot light following the manufacturer’s instructions. For electronic ignitions, contact a professional if there’s a malfunction.
  4. Empty or Low Propane Tank
    Propane furnaces won’t generate heat without adequate fuel.
    Solution: Check the tank’s fuel level and refill as necessary.

 

A furnace blowing cold air being serviced by an hvac technician.

 

How Can You Troubleshoot a Furnace Blowing Cold Air?

Before calling a professional, try these basic steps to resolve the issue:

  • Inspect the Thermostat: Ensure proper settings and replace batteries if needed.
  • Check Air Vents: Confirm that vents are open and unobstructed.
  • Examine the Air Filter: Replace if dirty or clogged.
  • Relight the Pilot Light: Follow your furnace manual’s instructions.
  • Verify Power Supply: Ensure the furnace is connected to power and the circuit breaker isn’t tripped.

Pro Tip: Document any unusual symptoms, such as noises or smells, to provide valuable information to a technician if professional help is needed.

 

What Are the Costs Associated With Furnace Repairs for Cold Air Issues?

Repair costs can vary based on the severity of the problem. Here’s a breakdown of common expenses:

Issue Average Cost
Thermostat Replacement $150–$400
Air Filter Replacement $20–$50
Flame Sensor Cleaning $100–$200
Blower Motor Repair $300–$600
Ductwork Sealing $500–$1,000
Heat Exchanger Replacement $1,500–$2,500

 

How Does Regular Maintenance Prevent a Furnace From Blowing Cold Air?

Regular furnace maintenance plays a crucial role in preventing issues like blowing cold air. Annual check-ups ensure all components are functioning correctly, reducing the risk of breakdowns.

Key Benefits of Regular Furnace Maintenance:

  • Improved Efficiency: Cleaning and calibrating parts ensure optimal performance and lower energy consumption.
  • Extended Lifespan: Regular inspections prevent premature wear and tear, prolonging your furnace’s life.
  • Early Issue Detection: Technicians can spot and address minor problems before they escalate into costly repairs.
  • Consistent Heating: A well-maintained furnace provides reliable and even heat distribution throughout your home.

Pro Tip: Schedule furnace maintenance with Bear Valley Plumbing & Heating before the winter season to ensure your heating system is ready for colder months.

 

a furnace blowing cold air due to a faulty furnace's heat exchanger

 

Are There Common Mistakes Homeowners Make That Cause Cold Air Issues?

Some homeowner errors can inadvertently lead to a furnace blowing cold air. Avoiding these mistakes can help keep your heating system running smoothly.

Frequent Mistakes to Avoid:

  1. Neglecting Filter Replacements: Dirty filters restrict airflow, causing the furnace to overheat and shut down. Replace filters every 1–3 months.
  2. Blocking Air Vents: Furniture or curtains that obstruct vents can reduce airflow and impact heating efficiency.
  3. Overlooking Duct Leaks: Failing to seal ductwork leaks can result in cold air mixing with heated air, reducing overall warmth.
  4. Ignoring Early Warning Signs: Unusual noises or inconsistent heating often indicate underlying problems. Address these issues promptly to avoid major repairs.
  5. Incorrect Thermostat Placement: Placing a thermostat near heat sources or cold drafts can cause inaccurate temperature readings, leading to improper furnace operation.

By avoiding these common errors, you can maintain a well-functioning furnace and ensure consistent heating in your home.

 

Schedule Furnace Repair With Bear Valley Plumbing & Heating

Don’t let a malfunctioning furnace leave your home cold and uncomfortable. Call Bear Valley Plumbing & Heating at 909-584-4376 to schedule a service appointment today. Our experienced team is here to ensure your furnace operates efficiently, keeping your home warm and safe.

 

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FAQs About Furnace Blowing Cold Air

Why does my furnace start warm and then blow cold air?
If your furnace starts with warm air and then switches to cold, it may be overheating due to restricted airflow. Solution: Replace the air filter and ensure proper ventilation.

Can a dirty flame sensor cause my furnace to blow cold air?
Yes, a dirty flame sensor can prevent the furnace from igniting properly. Tip: Have the sensor cleaned or replaced by a professional.

What should I do if my pilot light keeps going out?
A pilot light that won’t stay lit could indicate a problem with the thermocouple or gas supply. Solution: Call an HVAC technician to inspect and fix the issue.

Is it normal for my furnace to blow cold air initially?
Yes, it’s normal for the furnace to blow cold air briefly as it warms up. However, if it continues, there may be a mechanical issue.

Can thermostat placement affect my furnace’s performance?
Yes, a thermostat placed near drafty windows or heat sources may cause inaccurate readings, leading to improper heating.

How often should I schedule furnace maintenance?
It’s recommended to schedule furnace maintenance annually, preferably before the heating season begins. Regular tune-ups keep your system running efficiently and help identify potential issues early.

Why does my furnace blow warm air at first and then turn cold?
This could indicate an overheating furnace due to clogged air filters or faulty blower motors. Replacing the air filter may resolve the issue.

Can a power surge affect my furnace?
Yes, power surges can damage electrical components in your furnace, causing malfunctions. Consider using a surge protector for added safety.

Why is my furnace not heating all rooms evenly?
Uneven heating may result from duct leaks, poor insulation, or an improperly sized furnace. Sealing ducts and upgrading insulation can help.

Is it safe to reset my furnace if it’s blowing cold air?
Yes, resetting the furnace can sometimes resolve minor issues. However, if the problem persists, consult a professional for repairs.

What Happens If the Expansion Tank on Your Water Heater Is Bad?

Posted on January 01, 2025 5:30 AM by Bear Valley Plumbing & Heating

A faulty expansion tank on your water heater can lead to pressure imbalances, water leaks, and even damage to your plumbing system. These issues not only disrupt your hot water supply but may also result in costly repairs if left unaddressed. Prompt inspection and repair are critical to protecting your water heater and ensuring your home’s safety.

With over 30 years of experience serving Big Bear homeowners, Bear Valley Plumbing & Heating specializes in diagnosing and resolving water heater issues, including expansion tank failures. In this article, we’ll explore the symptoms of a bad expansion tank, its role in your water heating system, and how to address potential problems effectively.

 

What Is an Expansion Tank and Its Role in a Water Heater?

An expansion tank is a small auxiliary tank attached to your water heater to absorb excess pressure caused by thermal expansion. When water is heated, it expands, increasing pressure in your plumbing system. The expansion tank prevents over-pressurization by providing a safe space for the excess water to go, protecting your water heater and plumbing system from damage.

Without a functioning expansion tank, your water heater may experience:

  • Frequent leaks.
  • Premature wear and tear.
  • Burst pipes or damaged valves.

 

How Long Does an Expansion Tank Last?

An expansion tank typically lasts 5–10 years, depending on factors like water quality, maintenance, and usage. Regular inspections can help identify wear and extend its lifespan.

To maximize the life of your expansion tank, schedule annual maintenance with a professional HVAC technician. Early detection of issues such as corrosion or pressure imbalances can prevent premature failure. If your tank is older than 10 years, consider replacing it proactively to avoid costly damage to your heating system.

 

How Can You Tell If Your Expansion Tank Is Bad?

Signs of a bad expansion tank include leaking water, fluctuating pressure, and unusual noises from the tank or pipes. If you notice any of the following symptoms, your expansion tank may need repair or replacement:

  • Visible Leaks: Water pooling around the expansion tank signals a failure.
  • High Pressure: Increased water pressure in your plumbing system can damage fixtures and valves.
  • Noisy Pipes: Knocking or banging sounds may indicate air or pressure imbalances in the system.
  • Inconsistent Hot Water: Uneven heating or fluctuating temperatures could be caused by a failing expansion tank.

 

 

Why Is a Functioning Expansion Tank Important?

A properly working expansion tank is crucial to maintaining a safe and efficient water heating system. When the expansion tank fails, excess pressure builds up, potentially leading to water heater damage, leaks, and costly repairs.

Here’s what happens when the expansion tank is bad:

Problem Impact
Excess Pressure Damages pipes, valves, and the water heater.
Frequent Leaks Increases water waste and repair costs.
Reduced Water Heater Lifespan Premature failure of components due to excessive strain.

 

How to Test Your Water Heater Expansion Tank

To check if your expansion tank is functioning properly, you can perform these simple tests:

  1. Pressure Test: Use a pressure gauge to check the system’s pressure. If the pressure exceeds the recommended range (usually 40-80 psi), the tank may be failing.
  2. Tap Test: Gently tap the expansion tank. A waterlogged tank will sound dull, while a healthy tank will sound hollow.
  3. Check the Air Valve: Open the Schrader valve on the tank. If water comes out instead of air, the diaphragm has likely failed.

Pro Tip: Always consult a professional HVAC or plumbing technician for accurate testing and diagnosis.

 

 

What Are the Costs of Replacing a Bad Expansion Tank?

Replacing an expansion tank typically costs $150–$300, depending on the tank size and system complexity. Labor costs may vary.

The cost of replacement includes:

  • New Tank: Price ranges based on size and type.
  • Labor: Installation fees depend on accessibility and complexity.
  • Additional Repairs: If the failure caused other issues, repair costs may increase.

 

How to Prevent Expansion Tank Failures

Regular maintenance, checking pressure levels, and inspecting the tank for wear can help prevent expansion tank failures.

Tips for prevention:

  • Schedule annual furnace inspections.
  • Monitor system pressure regularly.
  • Replace the expansion tank at the first sign of wear or malfunction.
  • Use a high-quality tank suitable for your furnace.

 

Why Choose Bear Valley Plumbing & Heating for Your Water Heater Needs?

With decades of experience serving the Big Bear community, Bear Valley Plumbing & Heating is your trusted partner for water heater maintenance and repairs. Our skilled technicians can diagnose and resolve expansion tank issues quickly, ensuring your water heating system operates safely and efficiently.

 

A resident calling a professional for expansion tank furnace repair.

 

Schedule Your Water Heater Service Today

Don’t let a faulty expansion tank compromise your water heater’s performance or your home’s safety. Call Bear Valley Plumbing & Heating at 909-584-4376 to schedule a professional inspection or get a free estimate. Let our experienced team keep your hot water flowing smoothly all year round.

 

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FAQs About Water Heater Expansion Tanks

How long does a water heater expansion tank last?

With regular maintenance, an expansion tank can last 5–10 years. Annual inspections help extend its lifespan.

Can you repair a leaking expansion tank?

In most cases, a leaking expansion tank must be replaced. Repairs are rare and often not cost-effective.

Is an expansion tank necessary for all water heaters?

Expansion tanks are required in systems with closed-loop plumbing to prevent pressure buildup.

What causes an expansion tank to fail?

Common causes include a ruptured diaphragm, corrosion, or excessive water pressure.

How do I know if my expansion tank is working?

Check the pressure gauge and tap the tank. Properly functioning tanks will show balanced pressure and sound hollow at the top when tapped.

What happens if you don’t replace a bad expansion tank?

If you don’t replace a bad expansion tank, excessive pressure can build up in your plumbing system, causing leaks, damage to your water heater, and potential pipe bursts. Neglecting replacement can lead to costly repairs and reduce the lifespan of your entire water heating system.

How do I choose the right expansion tank for my water heater?

To choose the right expansion tank, consider the size of your water heater, your home’s water pressure, and whether your plumbing system is closed-loop. Consult a professional plumber to ensure the tank is properly sized and compatible with your system for optimal performance.

How to Maximize Furnace Efficiency in Big Bear, CA

Posted on December 15, 2024 5:30 AM by Bear Valley Plumbing & Heating

In the cold winter months of Big Bear, CA, a reliable and efficient furnace is crucial for keeping your home warm without skyrocketing energy bills. Given Big Bear’s high-altitude location, certain adjustments and maintenance steps can significantly enhance your furnace’s performance and longevity. Here’s how to make the most out of your heating system this winter with practical, effective steps.

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How Much Do Plumbers Charge Per Hour Near Me in Big Bear, CA?

Posted on December 05, 2024 9:40 AM by Bear Valley Plumbing & Heating

If you’re facing a plumbing issue in Big Bear, CA, you might wonder, “How much do plumbers charge per hour near me?” Knowing the typical rates can help you budget for the repair and avoid unexpected expenses.

Plumbers near Big Bear, CA, typically charge between $80 and $150 per hour, depending on the complexity of the job and the plumber’s experience. Emergency services or specialized tasks may cost more, averaging $150 to $250 per hour. Always request a detailed estimate before hiring.

With decades of experience serving homeowners in the Big Bear area, we’re here to help you understand plumbing costs and what factors influence them. In this guide, we’ll break down hourly rates, additional fees, and tips for finding a reliable plumber near you.

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What Size Furnace Do I Need? How to Calculate BTU Requirements

Posted on December 01, 2024 5:30 AM by Bear Valley Plumbing & Heating

Choosing the right furnace size is crucial for maintaining comfort and energy efficiency in your home. If you’re wondering, “What size furnace do I need?” understanding your home’s specific requirements is key to making an informed decision.

To determine the size of the furnace you need, calculate based on your home’s square footage and climate zone. For example, a 1,500-square-foot home in a moderate climate typically requires a furnace with 45,000 to 90,000 BTUs. Exact requirements depend on insulation, ceiling height, and local temperatures.

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What’s the Most Efficient Way to Heat a Home in Big Bear, CA?

Posted on November 29, 2024 5:30 AM by Bear Valley Plumbing & Heating

The most efficient way to heat a home in Big Bear, CA, is with a geothermal heat pump. This system uses the Earth’s stable underground temperatures to provide consistent and energy-efficient heating, perfect for the area’s high-elevation, cold-weather conditions. However, the best solution depends on your home’s specific needs, local climate, and budget.

At Bear Valley Plumbing, Heating & Air, we bring over 50 years of experience serving the Big Bear community. Our team specializes in installing heating systems tailored to the unique challenges of high-elevation living, ensuring your home stays warm, efficient, and comfortable all year.

In this article, I’ll cover the most efficient heating options, cost-saving tips, and how to choose the perfect system for your needs.

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How Much Does It Cost Plumb an Entire House in Big Bear?

Posted on November 26, 2024 5:30 AM by Bear Valley Plumbing & Heating

Plumbing is a crucial part of every home, responsible for delivering water to your taps, draining wastewater, and supporting fixtures throughout the house. Whether you’re building new or re-plumbing an existing house, understanding plumbing costs helps you make informed decisions.

This guide covers everything from average costs and materials to labor and timeframes, giving you a clear picture of what to expect for plumbing in Big Bear. Additionally, it is important to assess existing plumbing for potential issues and costs when planning your plumbing budget.

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When to Replace a Stop and Waste Valve: A Big Bear Plumber Explains…

Posted on November 26, 2024 5:30 AM by Bear Valley Plumbing & Heating

Leaving your sprinkler lines active for the entire year isn’t un. However, you need to shut the water off during the cold to prevent it from freezing and bursting the pipes. This is where a stop-and-waste valve comes in. It is essentially a key for stopping water flow whenever you need to.

In this article, our Big Bear Plumbers discusses everything you need to know about when to replace your stop-and-waste valve. We also examine tips for maintenance and getting a long-lasting component.

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Can a Bad Thermostat Have Heat but Not Cool?

Posted on November 01, 2024 5:30 AM by Bear Valley Plumbing & Heating

Can a bad thermostat have heat but not cool? Yes, a malfunctioning thermostat can cause your HVAC system to provide heat while failing to activate the cooling function. This common issue often stems from faulty wiring, calibration problems, or sensor issues within the thermostat. In this article, we will explore the signs of a bad thermostat, the underlying causes, and how to troubleshoot and fix this problem.

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