Why Does My Furnace Keep On Shutting Off?

[Susana Johnette]

Generally, your gas heater must cycle on and off 3-8 times hourly, maintaining a comfortable temperature in your home. But a heating system that keeps shutting down every minute or 2 will not heat your house appropriately. Not only that, it may be signalling a larger issue that you need to look after.

So don't just sit there and shiver. Repair what's wrong with your furnace and find out how to fix it.

1. Heating System Airflow Is Blocked

Your furnace's heat exchanger needs a good flow of air to cool it down. If the air flow is blocked, the heat exchanger will overheat, activating the safety shutdown. That will protect your heater however leave you in the cold. Luckily, this is simple to fix.

Modification The Filter

Your heating system's air filter gets clogged with dirt and dust gradually, limiting air flow to the heating system. If you see your filter is blocked, all you need to do is change or clean it.

Change a disposable filter. Replacements are affordable and easily available, so stock on a few spares.

Tidy a recyclable filter. These are higher quality, however need a periodic cleaning. Vacuum off any dirt and/or gently wash and dry the filter, according to the manufacturer's directions.

Going forward, examine the filter monthly, and clean or change your furnace filter a minimum of every 90 days.

Open Some Vents

You might have closed a few vents in the past when your space got too hot. That's alright, but make certain some vents are left open. Once again, this is important to enable correct airflow to the heater.

2. Your Thermostat Is Faulty

Another factor your heater keeps shutting down could be the thermostat.

Examine The Setting

Guarantee your thermostat is turned on and switched to "HEAT." Also, double-check the temperature level. Someone may have adjusted it to a lower setting than you 'd like.

Check Thermostat Interaction With The Heating system

Have a friend stand near the heating system and listen while you change the thermostat from "LOW" to "HIGH." If she or he hears a sound, the issue is probably with your furnace. If not, your thermostat is likely malfunctioning.

Check Thermostat Positioning

A thermostat situated in a warm area (for instance, close to the kitchen area or on a sunny wall) will register a high temperature and shut the furnace off, while the rest of your space is still cold.

Talk with us about the best thermostats and the most efficient positioning. If your house tends to heat unevenly, consider a heat zoning system.

3. Flame Sensing Unit Is Rusty Or Soot-Covered

A flame sensor issue could be why your furnace keeps turning off. The flame sensor is a security device designed to switch off your heater if no flames are detected, safeguarding you versus unsafe gas fumes. If the flame sensing unit ends up being rusty or covered in soot, it can not spot flames, even when your heating system is running appropriately. As a result, the sensing unit shuts the furnace down.

This is a serious concern requiring timely expert heating system repair work.

4. Heating system Is Too Big

You may have been sold a heating system https://furnace-repair-vaughan.com which is too large for your house. If that's the case, it will heat your rooms quickly. As soon as the furnace reaches the set temperature level, the thermostat will shut it off, causing your home to cool quickly ... activating the furnace to turn on once again. This short-cycle pattern will not offer the home convenience you desire, and is hard on your heating system, too.

Look into changing your large furnace with a new, energy-efficient design that is properly sized for your needs.

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