If your heat exchanger doesn't get enough air, it can't transfer enough heat. Electric space heaters are a great way to keep warm during cold weather, but lots of folks find that they can’t run theirs for very long before they trip a circuit. As can happen with many appliances, they can get dirty and therefore clogged. Take a … Reasons Why Your Propane Heater Keeps Shutting Off. If this screen gets clogged up it can't function as it's supposed to. Normally, your gas furnace should cycle on and off 3-8 times hourly, maintaining a comfortable temperature in your home. What may be happening is that your aux heat is turning on when your thermostat falls to 68, but then it turns off when it reaches 70, but the heat pump stays on trying to get the house up to 71. Not only that, it may be signalling a bigger problem that you need to take care of. So don’t just sit there and shiver. Furnace Won’t Turn Off; Why Your Furnace Keeps Turning On and Off. Oversized Heater. A burnt smell — or a heater that’s actually smoking — is a clear sign that something is wrong. Then that heat builds up and could end up causing your furnace to short cycle. Below, we will troubleshoot the various causes for a furnace that keeps turning on and off every few seconds. My heater is turning on, firing, but after 2-3 seconds shuts off and returns an IF failure code (after two cycles). These are installed at the bottom of your water heater. When I set the dial to 1 and the thermostat to max, it keeps on heating just fine. If you’ve run into this issue, you may be wondering what’s going on and how to get actual heat out of your unit without having to constantly reset the circuit breaker. If it’s flickering, split, small, orange or yellow-colored, then the pilot tube needs to be cleaned. Before heading towards the solutions, we have to understand the problem first. However, an unpleasant smell can merely be a sign of a dirty air filter or dust buildup in the furnace. You can clean it out by turning off the gas first then gently poking a needle into the top of the pilot tube. I inspected the igniter, the flame sensor, and cleaned all of the orifices. Here are a few steps you can take to turn off the heat before giving Robert B. Payne Inc. a call: Which means that it won't let in enough air which is needed to keep the gas burners on. An electric fireplace can automatically shut off when: The unit has overheated Airflow into the fireplace is restricted The temperature setting has been reached The heater outlet is blocked The heater element is dirty or dusty Incorrect bulbs are used. However, a furnace that won’t shut off can be equally frustrating. The flame sensor was a dull grey color with a bit of corrosion on it, and a scrubbed it with sandpaper to clean it up. If your furnace smells like burning, shut it off and unplug it immediately, as leaving your heater on can potentially be hazardous. A draft could also cause problems with the propane heater pilot, in which case your best option is to eliminate the source of the draft. It normally won't turn off until the temp is above the set temp, so it would run until the house got to 71 (again, this is adjustable). You should keep all your vents open, even in the rooms you don't use. But a furnace that keeps shutting off every minute or two won’t heat your house properly. The moment I turn it to 2 (with the thermostat still on max) it goes off after about 60 seconds every time and remains off, regardless of how cold the room still is. When a heater is too powerful for a home, it will heat up the living spaces so fast that the thermostat will shut the heater off prematurely. This is the most serious issue that will cause a furnace to keep shutting off is an improper installation. However, it is important to understand how your furnace actually works (at a basic level) before troubleshooting – here is the 101 course. 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