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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 |

”I highly recommend Artic Air. When I moved into Manalapan, I had them completely redo my entire heating and cooling system, to include all new duct work. They completed the…”

- Anthony Piccolo
5 Rating |

”Always a pleasant and friendly experience whenever arctic has to come visit and maintain their equipment. All of their techs are pleasant and friendly and we even remember discussions we…”

- Dominic Ziccardi
5 Rating |

”I was very pleased with the air conditioner service we received from Arctic Air (Sal Delre) . Arctic technician Sal Delre arrived at our home at promised time. He diagnosed…”

- Usman Moghal
5 Rating |

”Our installer was very knowledgeable and worked hard until the job was done. Very respectful and professional”

- Ebony Dorsey
4 Rating |

”Arctic Air installed my gas steam boiler a few years ago and since then I have been having them come out to do the boiler startup in the fall. They…”

- Dana T.
5 Rating |

”Joe came to check both our furnace units in preparation for autumn and winter heating season. He was excellent and a good advertisement for the company. He was competent and…”

- Elizabeth Tortorella
5 Rating |

”Michael C did a super job with my heating start up. Friendly, professional and on time! See you in the spring for my air conditioning start up. Thx!”

- Amanda Caffrey
5 Rating |

”Absolutely love this HVAC service. We had a new one installed a year ago. Our electric bill is so much lower. They are extremely friendly and thorough. I have had…”

- Suzanne Z.
5 Rating |

”They were prompt in the appointment and thorough in the heating system check”

- Sue Jacobson
5 Rating |

”After using Arctic Air 20 years ago I knew where to go for my heating and central air conditioning needs for both reliable equipment and service. They're that good .”

- Tommy Baroni
5 Rating |

”The installation went very well. Artic Air from the beginning are very professional, punctual and well equip with knowledge on the system. Tom and his crew were excellent to deal…”

- Erwin B.
5 Rating |

”The installation went very well. Artic Air from the beginning are very professional, punctual and well equip with knowledge on the system. Tom and his crew were excellent to deal…”

- ERWIN BUSTAMANTE
5 Rating |

”Artic air was swift and Tony figured out what was wrong within 15 minutes I would highly recommend them.”

- William Padula
5 Rating |

”Arctic was recommended by Home Depot. It was a pleasure working with them. Alex was very knowledgeable and helped me through the process. I had many many quotes (7). He…”

- Fatima K.
4 Rating |

”Loved the crew. They were professional, they were fast, they knew their stuff, they cleaned up well. This team was awesome! The price for the unit was about average. I…”

- Patricia B.
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