Help with an electric heater?

[Ultradog MN]

I have a Marley portable electric heater that I use to heat my little shop office.
I have it wired to its own 220V 20A breaker.
It heats great but the thermostat/switch on it is not working properly anymore - have to manually turn it on/off.
Marley is still in business so I contacted them about a new switch. They want $125 +tax/ship for a new one.
I want to install a 220v relay and 24v transformer and use a remote thermostat.
I'd guess they use something like this for residential air conditioners.
Do they make a one piece 220V relay + 24V transformer unit?
Not sure what to search for...
Could someone provide a link - Amazon, Ebay, other? to a part (or parts) like that.
I would put it in its own enclosure and just wire my heater into that.
Sorry for so long. Thanks for any help.

 

[fitter30]

Just mount it on a handie box On the back side.

Cadet Double-pole 22 Amp Line Voltage 120/240/208-volt Mechanical Wall-mount Non-programmable Thermostat in White T522-W - The Home Depot

Provide an excellent comfort level to your home by selecting this Cadet Double Pole Wall Mount Mechanical Non programmable Thermostat in White.

www.homedepot.com

 

[ipgenie]

I'd also recommend a line voltage thermostat. You can get smart ones too if you want to control it remotely or program a schedule. Your power company may even have incentives available that would pay for the thermostat.
Put it on the back as suggested or locate it near the service panel to minimize wiring.

A contactor or relay and 24v thermostat will work too. Would be better if you want the thermostat further away because you would run low voltage wire to that location. Just more parts. Look for 24v coil and 240v 30a rating. Something like this should work.

Amazon.com

 

[jlv03]

I think this might work for your purposes if you want to use an LV thermostat for control: https://www.amazon.com/Aube-RC840T-...ransformer/dp/B0037MXM1C?tag=atomicindus08-20

 

[Ultradog MN]

I'd also recommend a line voltage thermostat. You can get smart ones too if you want to control it remotely or program a schedule. Your power company may even have incentives available that would pay for the thermostat.
Put it on the back as suggested or locate it near the service panel to minimize wiring.

A contactor or relay and 24v thermostat will work too. Would be better if you want the thermostat further away because you would run low voltage wire to that location. Just more parts. Look for 24v coil and 240v 30a rating. Something like this should work.

Amazon.com

I think? this is what I would like.
Want to have the thermostat mounted remotely.
Here are a couple of photos of what I have.
Line comes out of the panel and goes thru the wall into my office. Inside the office is an outlet for the heater cord. I would like to install the device you linked to in an enclosure between the panel and wall and leave the outlet as is.

 

[nadogail]

I powered my heater control relay with a 24 volt "Wall Wart" power transformer salvage from a discarded Lawn Sprinkler Control.

 

[ipgenie]

I think? this is what I would like.
Want to have the thermostat mounted remotely.
Here are a couple of photos of what I have.
Line comes out of the panel and goes thru the wall into my office. Inside the office is an outlet for the heater cord. I would like to install the device you linked to in an enclosure between the panel and wall and leave the outlet as is.

If you want to keep it simple and low cost, use a second single gang box next to your existing outlet and put this thermostat on it. Wire it to switch the outlet off and on.

https://a.co/d/biNDUSo

 

[PWC Repair]

OK, you can run L1 and L2 into a contactor, like this https://www.amazon.com/Conditioner-...-Definite/dp/B08T9WBLXB/?tag=atomicindus08-20

You can also tap off into a low voltage transformer like this....https://www.amazon.com/Transformer%EF%BC%8C-Secondary-Isolation-Transformers%EF%BC%8C24V-Transformer/dp/B0B8Z2XV7V/ref=sr_1_1?crid=X8984NAPV9CX&dib=eyJ2IjoiMSJ9.pGVzimVcQrEjkbrGtivjJDojALTEUeb8rR8t7QMkqp9x7kh04O2-v_oDcC-Z8kafAJ65iR4C0EnQrZ9nto9-VYi5K6YCvqJI-0Vc3EgcpprDj6rPUMWn484-Ubf4xinHNlXqClNEHl4adg2ijRxP0spzEpBTm1pBP0sQ8czv81yJmf19ZMT9nq2YB2sDKDfx3lL688Yiwo_m8qBjXK2lfpCceqFutr8FZvMNxy8AirHUZ9EVNNo5LkvGpRLWMLAsqlVdqvAASbCtPmWFube_gAonyhBUlDzttzWSy5cYtMqqjWBtdFhbvp4eFko8cM10TxJNJobu2FotWprR0s6TAiS0onWI4On8hJtyYfcqdG1_Q7VMJ3I5x4hBYfAxMU4srOohZnm0CFpUtan5SedVgqsGAdsLI2rR7-QE6-BefFN5DaDIjD0R4sllyS8v_dYr.5bn5lWESN2Fj2RysuUf5wxNKInVpKj_s1lik0MfdShQ&dib_tag=se&keywords=220+24+transformer&qid=1739064433&sprefix=220+24+transformer%2Caps%2C930&sr=8-1

Then out of the transformer you will have the required 24v you need to power pretty much any type of thermostat you want. You just need some low voltage control wire from the transformer to the T-stat.....then the t-stat back to the coil on the contactor. Call for heat powers the coil which makes the contactor switch and allows the voltage to continue on it's path to he heater. And since the control wire can be had with multiple wires you only need to make one wire run. Those 2 parts are also found in pretty much ANY hvac scrap pile for free if they'll let you pilfer!

 

[BillK]

By the time you do all of that **** you will spend almost as much as fixing it correctly. Geeeze.

Or, take the switch out and see if there is a part number on it. You can probably get one from Mouser or Grainger for less than Marley wants.

I have the same heater and it has worked great for 25 years.

 

[The Cobbler]

I would probably just use a built in type thermostat for a baseboard heater to replace the existing one .

 

[BillK]

This is probably the correct replacement for your heater. Mine is a MUH35 and looks identical to yours. Double check the part number on the switch. They are also on Amazon etc

Qmark Heater Built-in Thermostat for Qmark MUH35 Series Garage Heaters (Qmark Heater 5813-2050-000) | HomElectrical.com

Buy Qmark Heater 5813-2050-000 Built-in Thermostat for Qmark MUH35 Series Garage Heaters on HomElectrical.com. FREE SHIPPING with minimum purchase of $75.

www.homelectrical.com

This is the heater I have:

UNIT HEATER - MUH35 SERIES - Marley Engineered Products

IDEAL SPACES | Factories; Garages; Schools; Shipping Docks; Warehouses COLOR| Bronze TEMP RANGE | 40-90 F CFM | 210 DIMENSIONS | 22″ L x 16″ H (14″ w/o bracket) x 8″ D For primary or spot heating in factories, warehouses, garages, and other open areas, these unit heaters excel. With a variety of...

www.marleymep.com

 

[no704]

I’ve used Inkbird PID controllers for many things. Comes with a 40A ssr. I have one running a pottery kiln. Cost is like $45.