Heater will light but will not stay lit - Desa International GWP20T GLOWARM Wall Mounted Panel Heater

Me again :>D There is various help here in video and text based format.

OPERATING INSTRUCTIONS AND OWNER'S MANUAL - Mr ...

https://www.mrheater.com > download > link
PDF
Do not try to light any appliance. ... This appliance is only for use with propane or natural gas. ... Natural and Propane/LP gases are odorless. An odor.

How to Troubleshoot Propane Heaters - Home Guides

https://homeguides.sfgate.com > ... > Home Improvement
If your propane heater has a standing pilot, you should be able to see it through a ... If the pilot won't stay lit, it may be because there's a draft, ...

3 Common Mr. Heater Pilot Light Problems (Troubleshooting)

https://www.camperupgrade.com > mr-heater-pilot-light...
Jan. 30, 2021 - Usually when your heater's pilot light won't stay lit then this indicates that your device's sensors are running into some problem. The sensors ...
Videos in this link

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cannot bypass need new one

Check the flame sensor is clean . Also check out the pressure switch . Check out the snap disk high and low temp .

thats sounds like a thermocouple problem its located right by the pilote light assembly,,,rod shaped object

thermocouple probablly bad, is the flame covering the thermocouple.
the flame has to hit top portion of thermocouple to work correctlly.

It sounds like a thermocouple has gone bad. this is a very common problem with gas powered things ie; water heaters, furnaces, hot tubs. The telltale sign is when you release the pilot light button it won't stay lit. This is a safety feature and is relatively inexpensive and easy to repair.

Do you have the serial number or the manufacture date? There are some design changes and I would need to know the year of manufacture to assist accurately. Usually it is a relay or the thermocouple connection that will affect the unit staying lit.

replace the therocouple. next year do not turn the pilot off

crappy pilot flame (not properly heating the thermocouple), bad thermocouple, thermocouple loose where it screws into the pilot safety valve, bad safety valve magnet.

One or more of those is the problem.

Oh...there is also a saftey switch...in case it tips over. It will also cause the pilot to not stay lit (if the switch or wires that go to i are faulty)