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Furnace Troubleshooting Guide: Keep Your Home Warm
Posted On: November 2, 2024
Is your furnace acting up? There’s no need to panic just yet! A few basic troubleshooting steps can often save you time and money, especially if the problem is simple. Here’s a guide to help you identify common furnace issues, understand their causes, and perform some easy fixes.
1. Check the Thermostat
- Problem: The furnace doesn’t turn on or doesn’t seem to heat effectively.
- Solution: Ensure your thermostat is set to “Heat” and that it’s on a temperature setting higher than the current room temperature. Make sure it’s powered on, and check the batteries if it’s a battery-operated model.
Tip: Clean your thermostat regularly. Dust can affect its functionality, causing it to misread the room temperature.
2. Inspect the Air Filter
- Problem: Reduced airflow or uneven heating throughout your home.
- Solution: A dirty air filter restricts airflow, making your furnace work harder and less efficiently. Inspect and replace your filter every 1-3 months, depending on the manufacturer’s recommendations.
Tip: Consider setting a reminder to change your filter each season to help your furnace run smoothly.
3. Check the Furnace Switch and Circuit Breaker
- Problem: Furnace won’t start at all.
- Solution: Make sure your furnace switch (located near the furnace itself) is in the “On” position. If the furnace still doesn’t start, check your circuit breaker to ensure the furnace’s circuit is not tripped.
Tip: If you reset the circuit breaker and it trips again, avoid further troubleshooting and contact a professional. This could indicate a more serious electrical problem.
4. Ensure Proper Ventilation and Clear Vents
- Problem: Uneven heating, weak airflow, or furnace shutting down unexpectedly.
- Solution: Inspect your home’s vents and make sure they aren’t blocked by furniture, curtains, or other obstructions. Also, check for anything blocking the furnace’s external vents.
Tip: Periodically walk through your home to make sure vents and registers are fully open and free of obstructions.
5. Look at the Furnace Pilot Light (Gas Furnaces Only)
- Problem: Furnace isn’t producing heat.
- Solution: For gas furnaces with pilot lights, check to see if the flame is lit. A functioning pilot light should burn a bright blue. If it’s off or burning yellow, you may need to relight it or contact a professional to address a potential gas leak.
Warning: If you suspect a gas leak, leave your home immediately and contact emergency services. Do not attempt to fix this issue yourself.
6. Examine the Furnace Flame Sensor
- Problem: Furnace turns on but shuts down shortly after.
- Solution: A dirty or faulty flame sensor can cause your furnace to shut off unexpectedly. Carefully clean the flame sensor with a soft cloth or emery paper, but ensure the furnace is off before doing this.
Tip: If this doesn’t fix the problem, consider calling a professional for further inspection.
7. Listen for Unusual Noises
- Problem: Furnace is making strange noises (banging, rattling, or screeching sounds).
- Solution: Banging noises can indicate issues with the burner, while rattling may suggest loose parts. Loud screeching noises often point to issues with the blower motor. Tighten any loose panels, but if the noise continues, call a technician.
Tip: Regular maintenance can prevent many of these issues from developing in the first place.
8. Inspect Blower Motor and Belts
- Problem: Furnace blows cool air or has weak airflow.
- Solution: Check the blower motor for dust buildup or worn-out belts. Dust can sometimes prevent the blower motor from working effectively, and old belts might need replacing.
Tip: Be cautious when working near the blower motor. It’s best to turn off the furnace completely to avoid injury.
9. Test Furnace Safety Switches
- Problem: Furnace won’t start or shuts off unexpectedly.
- Solution: Safety switches prevent the furnace from overheating. If they’re malfunctioning, they may need to be reset or replaced.
Tip: Most homeowners should avoid handling safety switches, as incorrect handling can lead to further issues. If you suspect a switch problem, consult a licensed technician.
When to Call a Professional
If you’ve gone through these steps and your furnace is still not working properly, it’s time to call a licensed HVAC technician. Additionally, any issues related to gas leaks, electrical faults, or complex mechanical components are best left to professionals.
Regular Maintenance Keeps Your Furnace Running Smoothly
Remember, regular furnace maintenance, like cleaning the blower and replacing air filters, can help prevent many common issues. A professional inspection at least once a year can ensure your system is ready for the colder months.
With this troubleshooting guide, you’ll be better prepared to handle basic furnace issues and keep your home warm and comfortable throughout the winter.
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See What Our Customers Are Saying:
Jan 4, 2023
We have been shopping for a heat pump for our home. We had 3 reps come in and make recommendations and provide a quote. Of the 3, Bob was so clearly so much more qualified, thorough and informed than the other two that the decision was a no brainer. As soon as we get our audit results Twintech will be installing our heat pump.
Jan 4, 2023
knowledgeable sales person, did not try to up-sell unneeded features,
and was easily contacted to ensure customer satisfaction.
Installation was expertly done by friendly guys, everything explained for use of the products. Old products were removed and returned to rental company as part of the service. Follow up call was received to check all was well. This is my second time using this company as I was fully satisfied with my previous air conditioning unit installation
Jan 4, 2023
Twintech recently installed a new furnace for me. Bob did a great job assessing what I had and needed. All details well explained including the importance of proper sizing of furnace and the value of multi stage heating and the variable speed blower. As a nurse, indoor air quality is a high priority so the variable speed motor running continuous is so good. 24/7 air cleaning. Greg did a great job on install, attention to detail so appreciated. Already notice such an improved comfort and heat. Thank you Twintech! You come as advertised. I will recommend to anyone in need of heating or cooling!
Jan 4, 2023
We received various quotes from 4 different companies and right away, the prompt and thorough communication from Bob from TwinTech stood out. He introduced himself, sent sample sites and information, and always confirmed any agreed to dates and times.
Bob was friendly and extremely knowledgeable about the topic of HVAC and it was clear he was passionate about his profession. He approached the job as if he was installing in his own home.
Prior to the new furnace & A/C installation, our old units were loud and inefficient - having several rooms feeling too cold in the winter and too hot in the summer. After installing the recommended units, all rooms stay at a consistent temperature- even the finished basement.
I highly recommend the TwinTech team - just an outstanding job at a reasonable price point.
Jan 4, 2023
The experience with Twintech was great from the start. Bob the sales manager was friendly and professional and did not use any pressure tactics. He was very knowledgeable.
The installation was completed by the twin owners in about 6-7 hours. Clean quiet easy going didn't mind when I poked my head in to see progress. Highly recommend
Sep 8, 2022
Just choose Twintech!
I do not usually write reviews and should have done this a few days sooner. But I was and still am enjoying the increased comfort in my home from the new furnace installed by Twintech.
From my initial call and conversation with Bob, I already had a good feeling that I would like this company.
I was provided information, pictures of great quality work previously completed.
When Bob came for the inspection of the furnace he was amazing. He gave so much great advice and told me all the areas that his team would resolve. I was very impressed as some of what he had suggested I had only seen in Youtube videos. The honesty and options for payment made this a no brainer. I decided I would like Twintech to replace my furnace.
The work was scheduled promptly week and took place within half a day. Gregg came to install the new furnace. Again amazing they carried out all the work promised. What was left was the best I have seen and speaks to how they take pride in the work they do and deliver. Gregg was really polite and professional and the furnace in my basement is a work of art.
Sep 7, 2022
They were friendly, fast, clean, & answered any questions I had. They are also offering an interest free 12 month payment plan - that really helped me out since this was an unexpected expense.
Sep 6, 2022
I had Twintech heating install a new furnace and ac unit. Bob, the sales rep, the installation team of Greg and Mitch were a 10 across the board. They were never pushy, gave me time to think about it. Once we decided , they were there in 24hrs. Great company to deal with. And they were nearly 5k less than a competitors quote for a top of the line furnace/ac unit verse mid level.
I highly recommend Twintech heating to anyone interested in anything HVAC.
Sep 5, 2022
Our hot water tank died and with an after hours phone called Bob the sales guy jumped into action. Friendly, courteous and genuinely wanted to do whats best for our house hold we were given options and he awaited an answer with no pressure.
We decided on what we wanted and it was installed asap and Greg and team worked and cleaned up so well, you would never know there was a hot water tank there before!
We love our hot water tank and being able to have back to back to back showers without having to wait for the hot water tank to heat the water!
Sep 4, 2022
I had heard of Twin Tech from a good friend of mine.
I needed to get a new Air Conditioner. It was not working properly and was 19 years old. I decided to get a new furnace at the same time.
I gave them a call on Saturday June 28.
I spoke to Bob Graham. I made arrangements for him to attend my house the following day.
I saw him on Sunday June 29 at 1100 AM.
He was on time and looked professional.
He spent 2 hours with me going over what I needed. He also suggested that I purchase a Humidifier. He gave me a quote of just under $11,000.00 for the purchase and installation of a Air Conditioner, Furnace and Humidifier. He was not pushy and gave me time to speak to my wife.
I called Bob on Monday June 30 and made arrangements to have it installed by the end of the week.
On Friday June 3 they arrived at 830 AM.
Again, right on time.
Greg and Mitch worked all day and finished the installation by 430 PM.
They made sure that everything was working properly and the basement was just as clean as it was before they came.
I will now be using Twin Tech to perform any maintenance needed on this equipment.
I was completely satisfied from start to finish with the service provided.
Thank You,
Gary Grieves.
Upchurch Ave.
Ajax.
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