220 electric garage heater

[rooster4321]

I have this electric garage heater in my attached garage it only runs for about two minutes at a time and shuts off it's about 55f in the garage. I've cleaned it but it's not dirty any ideas on what to check?

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[rooster4321]

Here's a photo

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[OccupantRJ]

If it has a fan to blow the air out it may also have a high limit switch that is shutting down the unit to prevent overheating without air flow.

 

[Copymutt]

Had to reread your post a few times.
The shutting off after 2 min. is the problem. I thought it just did a great job.
I'd get rid of it, working or not. Resistance heating is the most inefficient use of electricity there is.
Look at the tag. Multiply the wattage X number of hrs you expect it to run,then divide by 1000, the X your kw/hr charge. Bet your gonna be pissed. Worse if it's only 110v.
If your determined to live w/ the expense. You'll find a protective thermo cut off somewhere in the wiring, its bad. Cheap to replace.

 

[rooster4321]

thanks for the responses Yes I have it wired for 220 /240 we only use it a couple hours a week in the winter seems like it used to run longer for 10 minutes or so before it shut off would the thermal shut off be a fuse or a switch

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[OccupantRJ]

Likely a thermal switch. Does a fan blow air while the unit is heating? Judging by the louvers I would think so.

 

[Copymutt]

It's a bimetallic switch that trips and then resets on cool down, no toggle just an in line small device.
https://www.google.com/search?q=thermo+switch&ie=UTF-8&oe=UTF-8&hl=en-us&client=safari

 

[rooster4321]

On Startup the fan runs and the element is heating up then after about a minute the heat stops but the fan still runs for another minute then it turns off and repeats after about 5 minutes

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[OccupantRJ]

what is the model number(s) of the unit?

 

[rooster4321]

This is the sticker on the side

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[OccupantRJ]

Found this much for you.

https://morelectricheating.com/repl...ermostats-elements-fan-blades-thermal-cutouts

https://www.dimplex.com/cms/publications/7202450001R11_EN.pdf

The wiring diagram may be inside the cover of the unit.

 

[rooster4321]

Thanks for the link yes the wiring diagram is inside the bottom tray I'll be testing a few things 89 bucks for a new scratch and dent good deal

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[Skiff Builder]

rooster,
I am having the same problem with a brand new 7500 w King. They are sending out a new internal thermostat(your black dial). In my case it's a single pole/single throw capillary tube stat. I'll let you know how it works out.

As far as the other post on throwing out due to running costs,might depend on where you are.
My 2 choices are propane or elec. 7500W cost me $1.13/hr on high.Half that on low.
Propane unit heater 80% efficient cost me $1.03hr and about 6 times the initial cost for same output.Propane companies here are unethical,thieving, blah,blah ,blahs. My choice for part time heat was easy.
Skiff Builder

 

[Crazyjake8493]

As far as the other post on throwing out due to running costs,might depend on where you are.
My 2 choices are propane or elec. 7500W cost me $1.13/hr on high.Half that on low.
Propane unit heater 80% efficient cost me $1.03hr and about 6 times the initial cost for same output.Propane companies here are unethical,thieving, blah,blah ,blahs. My choice for part time heat was easy.
Skiff Builder

For several years now I was putting off trying an electric garage heater because I was worried about costs. But like you said, sometimes it makes sense. I do have a wood stove but don't often have time to mess with it if I can only be out in the garage for an hour or two anyway. Right now I'm using a kerosene convection heater which heats well, but getting kerosene is expensive ($3.50/gal here) and getting it 5 or 10 gallons at a time is a pain. I no longer have a truck so I have to try to keep from getting a kerosene smell in our nicer vehicle.

An electric hanging heater would cost a bit more for me to run compared to kerosene, but the setup would be easy, and the initial cost would be much lower than running a natural gas line to the garage, including having to repipe the house to 1" to accommodate the higher load. It would take me quite a while to recoup the costs of a natural gas setup vs electric, especially only being in the garage 10 hours or so each week.

 

[Skiff Builder]

For several years now I was putting off trying an electric garage heater because I was worried about costs. But like you said, sometimes it makes sense. I do have a wood stove but don't often have time to mess with it if I can only be out in the garage for an hour or two anyway. Right now I'm using a kerosene convection heater which heats well, but getting kerosene is expensive ($3.50/gal here) and getting it 5 or 10 gallons at a time is a pain. I no longer have a truck so I have to try to keep from getting a kerosene smell in our nicer vehicle.

An electric hanging heater would cost a bit more for me to run compared to kerosene, but the setup would be easy, and the initial cost would be much lower than running a natural gas line to the garage, including having to repipe the house to 1" to accommodate the higher load. It would take me quite a while to recoup the costs of a natural gas setup vs electric, especially only being in the garage 10 hours or so each week.

Jake, I missed this post but answered you in the other one.