Why Is My Heater Not Working When My Thermostat Is On?

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Why Is My Heater Not Working When My Thermostat Is On?

Why Is My Heater Not Working When My Thermostat Is On?

Heater Not Working

Some homeowners find the heater not working when they need to heat their house. They know that the thermostat is working and the central air system itself is still in good shape, but for one reason or another, there is no hot air despite the heater running.

heater not working

As odd as it may sound, this is not an unusual problem. In fact, there are several reasons why you might be experiencing this in your own home.

(Side note: We normally refer to the heater as the furnace, but in this article we will use heater and furnace interchangeably.)

Technical Setbacks Keep Heating from Happening

Safety Switch

Safety Switch

Furnaces built after the 1990s come with a safety switch or safety shut out. These are safety measures put in place to prevent heating and air conditioning if there is a technical issue that can cause a hazard. In these cases, no matter what you do to the thermostat, the furnace will never kick in until the problem is found and fixed.

Such problems can include:

  • Dirty evaporator coils
  • Clogged pipes
  • Full air filters
  • Broken wires
  • Burnt control board
  • Dead blower motors

Whatever the issue may be, when the entire system refuses to start, homeowners need the assistance of their preferred HVAC contractor for further diagnostics on a heater not working.

There is No Gas – Heater Not Working

The central air system requires several different power resources. It uses gas, electricity and even water. Consequently, it is easy to lose track of what is on and what is off. Sometimes, homeowners call AC technicians about a problematic furnace only to discover that the power breaker was off.

Gas Valve in the Furnace

Gas Valve in the Furnace

In similar fashion, it is common to find that the furnace has trouble finding gas to use. This can be because the gas valve is stuck or the control board is unable to communicate. In these situations, the furnace is ready for heating, but because it is unable to build a flame, it cannot proceed with the process.

If all other gas appliances in your home still work, you may need to call an electrician to help troubleshoot.

The Furnace Needs Maintenance Work Done

Homeowners may encounter the peculiar problem of having heating stop after working briefly. This occurs when the furnace detects a problem mid-cycle. More often than not, it is simply matter of furnace maintenance.

Homeowners regularly underestimate how important and effective furnace maintenance can be. Just one appointment clears out residue, buildup and debris that can hamper energy efficiency and heating quality.

With furnace maintenance:

  • Motors spin without resistance
  • Burners hold fires without using excess gas
  • The furnace experiences less stress
  • There is less damage to parts such as motors and wires
  • The central air system lasts longer and works better

Schedule your furnace maintenance before the new season begins.

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Perfect Your Furnace with Service Champions

Service Champions Heating & Air Conditioning is responsible for restoring heating service to thousands of homes. Our team members always deliver exceptional heating service and superior customer care. We are certain that our furnace repairs, heating maintenance and heating installation will not be a disappointment.

To meet your AC contractor, contact our helpful representatives in our call center today.

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