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Back to Garage Heater Comparison Last update:

Steps To Install A Garage Heater

To learn how to install a garage heater thermostat there are several websites we can go to for detailed instructions including a youtube video:

By Don Brandt, who gives a three-part presentation on installing a thermostat for a workshop.

Home Depot offers an informative video (Here) on how to install a programmable thermostat also produced by youtube. If the garage heater thermostat is not working properly, check out The Family Handy Man at ( for tips on how to adjust our thermostat or when to know a thermostat needs to be replaced. In simple steps, this website tells us how to adjust the thermometer, level the thermostat and make adjustments to the anticipator.

Installing A Garage Heater

Dr. Heater DR966 240-volt Hardwired Shop Commercial Garage Heaters, 3000-watt/6000-wattWhen installing a garage heater there are options depending on the unit we are installing. We know there are many kinds of heaters available including those powered by electricity and natural gas. There are also different styles including forced air and radiant models. They all have mechanisms that are different in providing warmth. We need to consider that when working with gas lines and electricity, we may want to call in a professional to make connections, but there are steps we can deal with that will help cut down the cost of installation.

Electric heaters are the easiest to install in most garages. They are either corded or hand wired. The corded are obviously the easiest because we just plug them into a suitable outlet. Remove any clutter that is located around the heater before plugging it in. These corded heaters can be mounted or the wall or ceiling and are best placed in the back of the garage facing the garage door. Be certain that the power cord will reach the outlet and keep the area clear within three feet of the unit for efficiency and safety.

Hand-wired models can also be mounted to the wall or ceiling and should be placed in a similar place as the corded model. The unit has to be connected to the electrical system in our home, which means we need to run a cable from our heater to our circuit breaker box. If we are using a thermostat, we must run the same cable from the breaker directly to the thermostat and then to the heater. The garage heater will operate off the electrical system of our home.

If we are installing a gas garage heater, it is somewhat similar to installing an electrical unit with two exceptions. The heater must be hooked up to our gas line and we need to install a vent to allow fumes generated from the heater to escape out the roof or through the wall.

Check to see that garage objects are three feet away from the heater and check that the unit is placed in a space that seems to lose the most heat, like the garage door. If we are mounting the heater, we need to make certain that we allow clearance for gas venting and electrical connections either on the right or left side of the unit. For gas, there are instructions in our manual regarding making connections, sealing connections and the correct gas pressure to use. Piping must be secured and tested for leaks before we operate the unit. Once connected, we need to make any connections involving the electric system and we can run an electrical cable for a thermostat to control temperature.

When this is completed, the ventilation system has been installed. To do this, we should look at the manual to see that we are connecting the right sized vent ducts using a 90-degree venting elbow connecting one end of the vent to a hole in the wall or ceiling for proper ventilation. Next, we place a vent cap on the exterior venting system and seal the hole made in the roof or wall of the garage. Now we can test or installation and hope we have heat!

Now that our garage heaters are installed we have to keep it up and running by giving it an occasional clean.

  • Turn the garage heater off and allow it to cool down.
  • Wipe the heater's surface with a microfiber duster.
  • Remove heater's cover.
  • Clean heater's cover with a soft cloth or damp sponge to remove dirt and debris.
  • Run a vacuum of the heater's interior compartment.


garage heater troubleshootingIn general, maintenance doesn't seem to work and problems arise there are some issues to explore. For instance, if the fan is not working, we should first check the switch to make sure it is working properly. The heater blades can also be checked to look for obstructions. Next, look to see if the garage heaters fan motor has blown out. If it's receiving an electric current, but still not working, it's time to get a new motor.

If the heater is not producing heat, but the fan is working there are a few reasons like a heating element that is defective, a thermostat that is not working, frayed or loose wires, tripped or blown circuit breaker or if gas, the control valve is corroded or closed. Some of the problems we can solve by replacing or repairing the heating element, cleaning thermostat contacts and making sure heat mode is set for the thermostat. We can also reset by decreasing or increasing the thermostat temperature by a couple of degrees. We may need to replace or tighten electrical wiring, reset circuit breaker and replace or clean valves.

Sometimes a garage heater rapidly turns off and on and this could be something obstructing the air flow or the control switch for the thermostat is not working properly. If the heater is turning off and on rapidly. If this happens, we should check garage heater parts where air enters and replace or repair thermostat or control switch.

Storage When Not In Use

If our garage heater is used only during the winter season, we need to think about storage for it to keep it safe and sound and free from rust and damage that might require professional care when we go to use it again. Of course, before we store the heater, we should thoroughly clean inside and out. We should check the unit for any damages and have problems fixed before storing. Check the framework support and mounts for frayed wiring or loose bolts and repair those as well. We can tighten the electric fittings and loose bolts. when these chores are completed, we can wrap the heater in heavy plastic sheeting or a sturdy heater cover. The sheeting or cover can be tightened with heavy tape or rope.

Disclosure: Some of the links in this post are 'affiliate links.' This means if you click on the link and purchase the item, I will receive an affiliate commission.
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