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What To Do If Your Heater Stops Working

November 15th, 2017 by cverdone

Heater Maintenance

Did your heater working in the middle of icy weather? Don’t panic! Yes, you should be concerned, but letting yourself get overwhelmed with your emotions won’t help you in your situation. While we advise getting your HVAC professionally assessed and maintained before winter hits, sometimes, these scenarios can’t be helped. In case your heater stops heating, it pays to know the next step you should take. Below are the possible causes behind the reasons your heater stops heating and what you should do in each.

Thermostat Failure

Check if the thermostat has been correctly set and if the heater has been properly switched on. Take a look at the temperature. It should be higher than your current room temperature for it to have any effect. Next, check the battery level. It might just need a new one. If none of these work, buy a new one. Read the manual or ask the manufacturer which thermostats would be compatible with your heater’s model.

Unclean Filters

Most filters need to be replaced regularly. How often would depend on the kind of filter you have. The lowest priced ones usually need to be changed every month. For filters with prices falling somewhere in the middle range, once every three months. There are filters that are reusable but simply need to be cleaned every so often. While they’re money-saving in the long run, they’re often not recommended for hygienic reasons. When purchasing a new filter, make sure it’s the right size and it’s compatible with your heater. Read the manual for specifications or call the manufacturer.

Reaching The End Of Its Lifespan

Unfortunately, there’s no quick fix for this. Every item reaches a point when it’s past its optimum level of performance and this is especially true for HVAC systems. Regular maintenance would prolong the lifespan, but can’t totally prevent breakdowns. The best thing to do in this case would be to consult your HVAC expert on what you can do and whether it’s time to replace your furnace.

Mechanical Issues

In this case, avoid tinkering with the parts, pick up the phone and call your trusted HVAC professional. There’s a reason why these personnel undergo training and are required by law to have licenses before they can operate.

Flame And Gas Problems

For furnaces using pilot lights, see if a flame has been lit. It should stay on and maintain at a solid blue.Does it go out after a while? There could be a draft that blows on the flame. Make sure to close every door and window in the room. If the problem is with the ignition, best to call professional help. If you suspect a gas leak, call immediately and explain the situation.


Heaters are complex in design and with continuous innovation, there could be several differences in the machinery and parts between models. These are the most common but there could be several other possible reasons why it stops heating. As long as you have a trusted professional a phone call away, there’s nothing to worry about. For reliable furnace maintenance and repair services, call Thornton Heating at (847) 905-1608.