Copper Charmglow Heater will light but only stay on 5-10 min

I just had my new opener today. try this:
1. press & hold the LOCK button until the lights blinks.
2. if it is a single blink, the timer is 1.5 min.
3. if you repeat step 1, blink twice means 2.5 min.
4. if you repeat step 1......., 3.5 min
5. if you repeat step 1......., max is 4.5 min

Theres a thermostat inside, if its too cold and not warming up the thermostat enough it will shut off because it thinks there is a problem.

I would try replacing your Fuel Filter first. It could be that simple.

Replace the thermocoupler?

Could be the gas pressure regulator.

Probably a venting problem! Can be very difficult to diagnose and repair'

Try purging the air from the tank.

Well, I just went out this morning and worked on the heater after it would not light last night. Turns out that a spider or moth set up camp in the pilot light intake housing and plugged up the two small mixer holes that pull in air for the pilot light. This would explain the 'yellow-flame'. I took a punch awl and some compressed air and cleaned out the hole, then re-installed the cover and knob. Lastly, I turned and depressed the knob and the pilot light ignited almost instantly, stayed on when I let the knob up, and the heater turned on normally after that. Good luck, I hope this helps.

My charmglow heater is a yeAr old and the pilot will ignite and stay lit for ever,but when you let up on it it goes out! What cam I do?

check for proper pump pressure. Restricted fuel flow. Proper venting of fuel cap.