Have a Reddy Heater Model RLP55V (variable 30-55,000 Btu. Will not stay lit when button is released, even after several minutes of operation. It is the thermocouple, the valve, relay, or what?
If there is a brown copper line coming from gas valve is a thermol couple , and is bad when reinstalling don't over tighten it can damage the seat on the valve .
Possible the thermocouple bulb has slipped out of position and isn't being heated as it should. If it is a model with a pilot light, perhaps it is blocked.
The thermocouple is probably the most likely culprit.
Answers & Comments
If there is a brown copper line coming from gas valve is a thermol couple , and is bad when reinstalling don't over tighten it can damage the seat on the valve .
Possible the thermocouple bulb has slipped out of position and isn't being heated as it should. If it is a model with a pilot light, perhaps it is blocked.
The thermocouple is probably the most likely culprit.