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Furnace Ignition Failure
Posted On: September 22, 2024
Furnace ignition failure is a common issue that can prevent your heating system from working properly. There are several potential causes for this problem, and understanding them can help diagnose and resolve the issue efficiently. Here are some of the common reasons for furnace ignition failure:
1. Dirty or Faulty Igniter
The igniter is responsible for lighting the gas in your furnace. Over time, it can become dirty or wear out, preventing the furnace from igniting. Cleaning or replacing the igniter might be necessary.
2. Clogged Air Filter
A dirty air filter restricts airflow to the furnace, causing it to overheat and shut down. This can lead to ignition failure if the furnace overheats before ignition can take place.
3. Gas Supply Issues
If there's a problem with the gas supply, such as a closed valve, low pressure, or a malfunctioning gas line, the furnace won’t ignite. Ensuring that gas is flowing to the furnace is crucial.
4. Faulty Flame Sensor
The flame sensor detects whether the furnace's burner is lit. If it is dirty or defective, the sensor may shut down the furnace as a safety precaution, preventing ignition.
5. Malfunctioning Thermostat
If the thermostat is not communicating properly with the furnace, it might not signal the furnace to start the ignition process. Checking and recalibrating or replacing the thermostat can resolve this issue.
6. Tripped Circuit Breaker
A furnace requires power to ignite. If the circuit breaker has tripped, the furnace won’t receive the necessary power, leading to ignition failure.
7. Blocked Vents or Chimney
Blockages in the exhaust system, including the vents or chimney, can cause ignition issues because the furnace needs proper airflow for combustion. Clearing any obstructions can resolve this.
8. Pilot Light Issues (Older Furnaces)
In older furnace models with a pilot light, if the pilot goes out or is weak, the furnace won’t ignite. Reigniting the pilot or adjusting it might be necessary.
9. Control Board Problems
The control board is the furnace’s “brain,” managing various functions, including ignition. A malfunctioning control board may fail to initiate the ignition process.
Solutions for Ignition Failure:
- Check the air filter and replace if dirty.
- Ensure that the gas valve is open and the supply is normal.
- Clean the flame sensor and igniter if they are dirty.
- Reset the circuit breaker if it’s tripped.
- Inspect the thermostat to ensure it’s working correctly.
In most cases, if the issue persists, it’s best to contact a professional HVAC technician for repair. They will be able to diagnose and fix any deeper issues causing the furnace to fail ignition.
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See What Our Customers Are Saying:
Jul 17, 2024
They've cleaned my furnace a couple of times and mentioned that the hot water tank standards were going to change soon so I decided to change mine out.
There were a few challenges during the process but the installers handled the problems without missing a stride! I now have really hot water again!
Jul 16, 2024
Highly recommend Twintech Heating company, we got honest and detailed information on what was needed to replace and install a new gas furnace. Bob and Greg made us feel comfortable withe process through their thorough explanation and knowledge of the right furnace for our needs. The professionalism and courteous friendly attitude towards the customer is what we liked the most as they treated us like family. So happy with our decision and new furnace we will be looking into get our rental water heater replaced and installed by Twintech team. We feel better having their knowledge on our side and will only trust them with any further maintenance of furnace.
Jul 15, 2024
Customer service and knowledge is priority in this industry, and Twintech has it. I've dealt with their team for maintenance and a furnace replacement. They're accommodating and make great recommendations, and came through at a great price over the big guys in the industry. They'll be my next call when I need service or maintenance.
Jul 14, 2024
I decided that the noises and age of the existing furnace which was old and not very efficient to replace it. Gave Greg a call and Grant and Greg got to work on it. Because of supply issues with the current heating type that would be an easier install Greg convinced me to change the location of the system and it would provide me better service for heat and efficiency. I had skeptical but went ahead anyway putting trust in Greg And Grant. Greg, Grant and Mitch came through and in 2 days had completely relocated my heating and A/C system. I can honestly say Greg was right my old house has been warmer and more evenly heated as it ever was. For anyone reading this rather long winded review can take my word for it, Twin Tech can take care of your needs.
Jul 13, 2024
I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!
Jan 4, 2023
Great Team! Furnace broke in the weekend, Bob visited same day and Greg installed new one on Monday. Team was professional, respectful and knowledgeable. Installation went very well, Greg found solutions to challenges, like hiding new conduits in the ceiling. Looks nice and new furnace is working great. Five Stars.
Jan 4, 2023
I used Twintech to install a new furnace for my home. Bob was terrific in explaining the sizing options and why the 2 stage furnace was the best option for me. Greg did a great job installing, clean and on time. Finished work looks great but the best part is how it works. The 2 stage heating is so much more comfortable. I run the fan continuously to keep the indoor air clean. Great investment! Would highly recommendTwintech!
Jan 4, 2023
Im going to start this by saying Im a very particular customer. My background is in mathematics and mechanical engineering so I have an eye for detail and a respect for technical knowledge.
Greg had already done an AC inspection and replaced a water heater tank and there was no question in my mind who to deal with replacing my rickety old furnace after it got pooched.
Bob dropped in ahead of time and clearly (and knowledgeably) outlined all technical, price and operational options.
Greg showed up on time, on the agreed date and did a fantastic job. (The OLD furnace was a house of horrors and was installed in a keystone cops sort of way- careless.)
The work Greg did was HIGHLY PROFESSIONAL and FAR MORE FUNCTIONAL than what I had.
Im also a musician with many instruments so maintaining predictable humidity/temperature is extremely important to me. Greg recognized this as did Bob. You NEVER feel like youre being brushed off.
In summary, if youre looking for PROFESSIONAL, QUALITY results by an EXPERIENCED, THOUGHTFUL team
(that also happen to be FRIENDLY and ATTENTIVE ) then youve come to the right page!!
Jan 4, 2023
Once again Twin Tech came through and fixed my furnace. A young man by the name of Mitch came by tonight and he was so nice explained everything he was quick he was clean he turned off the lights even when he left the furnace room its just above and beyond Twin Tech always delivers and I just found out about them last year and I will use no one else but thanks again Mitch you are fantastic
Jan 4, 2023
I had a problem with the Furnace (Armstrong ultra V) and Greg diagnosed it on the phone. Even told me what the issue was and I was able to fix it. This level of service from a Business that is almost unknown today.
If you require service, reach out to Greg. I will definitely use them in the future!
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