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Why Doesn’t My Furnace Stay On?

Is your furnace running improperly? One of the most common furnace problems is when the burners won’t stay lit. This causes the furnace to fire up, heat for a few minutes, and turn back off before it has had time to reach the target temperature. Below are a few possibilities why your furnace doesn’t stay on and what to do about it.

4 Possible Reasons Your Furnace Isn’t Staying On

  • Malfunctioning thermostat: The thermostat may not be calibrated correctly, meaning the furnace thinks it has reached the desired temperature after running for only a few minutes. To find out, replace the thermostat with a cheap model. If the problem stops, you have pinpointed the problem. If not, return the new thermostat and continue troubleshooting.

 

  • Bad thermocouple: This heat sensor installed next to the pilot light serves the important purpose of closing the gas valve if the pilot light goes out so gas doesn’t fill your home. However, a malfunctioning thermocouple may lose the ability to sense heat from the pilot light, causing it to close the gas valve at random. If your furnace doesn’t stay on, check the pilot light. If the pilot light won’t stay lit, a bad thermocouple could be to blame. You may need a professional to come take a look and replace the malfunctioning part.

 

  • Full condensate pan: Newer condensing furnaces generate condensate, which drips into a pan and drains away. If the drain line becomes clogged, the pan may begin to fill up. Once the rising liquid hits a sensor, the furnace will automatically shut off to prevent the condensate from spilling over the edge. Check the condensate pan for this problem. If the drain is clogged, insert a straightened wire hanger to clear it out. Sending a bleach mixture or algaecide treatment down the drain may help prevent future clogs.

 

  • Blower motor not running: When the furnace runs, place your hand over a supply register. If you feel hot air exiting the vent, this means the motor is running like normal. If not, the motor has lost power for some reason and the furnace is switching itself off to prevent the heat exchanger from overheating. The fan relay might be broken or the blower motor belt might be worn out. A furnace repairman is your best bet for fixing these problems.

For more help figuring out why your furnace doesn’t stay on, contact Arctic Air Conditioning and schedule a furnace repair in Central Jersey!

Testimonials
5 Rating |

”Jesse was prompt, courteous, reliable and did a really good job!”

- Clark Herman
5 Rating |

”Prompt, efficient and thorough at a very fair price. Couldn’t ask for more!”

- Thomas Carson
5 Rating |

”We just had a new system put in and from start to finish we could not have had a better experience. The techs were super knowledgeable and when they were…”

- Jill Ferkel Slater
5 Rating |

”He was very friendly and professional. He completed a very thorough job! That’s why we keep using Artic Air!”

- tammy
5 Rating |

”Clean, Professional, friendly and knowledgeable. Explained everything Units were installed in less than 24 hours after we made the decision to replace. Techs are friendly and honest. Even leaving the…”

- Jeff Penchansky
5 Rating |

”Technician (Kevin Duffy) did an outstanding job troubleshooting and then correcting the problem. He was very professional, knowledgeable and courteous . He cleaned up after the repair and explained what…”

- The Murphy's
5 Rating |

”Very professional. Jesse was very professional and polite. We round recommend Arctic Air as we feel they were honest and professional. Arrived at the allotted time and confirmed apply.”

- Leslie Rosenthal Kohn
5 Rating |

”Technician was very professional and knowledgeable. H explained the findings to me very thoroughly.”

- salvatore
5 Rating |

”We are very pleased with Artic Air. Jesse Evert was the technician who came to our home twice. Very professional, polite and knew his product. They have always arrived at…”

- Leslie Kohn
5 Rating |

”Jesse was on time, he was actually early. When he got here, he introduced himself and I explained my problem. He gave my A/C a complete examination and explained that…”

- michael
5 Rating |

”All was good! Upon his arrival, Jesse, explained everything about what this service call involved and what he was going to do. He then gave a detailed explanation following his…”

- lisa
5 Rating |

”Arctic Air is by far the best place I have seen. My install of the HVAC system was flawless! The technicians were so well versed, and so respectful of my…”

- Terri Amato
5 Rating |

”Matt was professional and knowledgeable. fixed our problem quickly!”

- Alok Saksena
5 Rating |

”Nice man, got the job done and our unit up and running in no time!”

- James Doria
5 Rating |

”Robert was knowledgeable, on time, and just overall great. Thanks for the fix!”

- Marina G
5 Rating |

”Jesse was very polite and knowledgeable. He answered all my questions and provided options to address my AC issue. So happy to have properly working AC and will definitely use…”

- suzanne
5 Rating |

”Tony was amazing. So kind and patient. Made me feel extremely comfortable. Very much appreciate the work he did in our home. Thanks again Tony for an interesting day.!!”

- Gina Bilz
5 Rating |

”Attic air installed a central air conditioning unit in my home today They arrived around 9:00am and were don by 2:30pm They were clean and neat Continued working I didn’t…”

- Maria Vignola
5 Rating |

”Kevin was great. He explained everything that needed to be done. Kept us in the loop so to speak. Could not ask for anyone better!”

- Ed Russin
5 Rating |

”We bought a new house and as luck would have it the AC went in the first few weeks. The Arctic Air Conditioning team was quick to come out and…”

- Michael Carrig
5 Rating |

”Again, Arctic Air did not disappoint! The experience from start to finish was first class, professional and efficient. The crew was thorough in its planning of the installation and thoughtful…”

- Semmes Brightman
5 Rating |

”I have used arctic air now on two seperate occasions. Each time a different technician . The reason why that is important, because they both were AWESOME. They do not…”

- J R
5 Rating |

”Excellent service. Technician was professional, candid, and efficient.”

- liz
5 Rating |

”The whole crew was awesome!! Thank you very much Artic Air.”

- Gary Brandspiegel
5 Rating |

”My air conditioning unit stopped working in 90 degree weather. Needless to say that it became very uncomfortable to live in my home. I googled “air conditioner repair” and scrolled…”

- HammRtrini
5 Rating |

”Great professional well done job by Dan. Thanks”

- Robert Contreras
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