Fireplace Issue Thor 3901

[sjccdakin]

Back again! Fireplace stays on for a couple minutes and turns itself off. Any ideas why?

[sjccdakin]

Still learning how to maneuver this forum. Found lots of comments about fireplace. I have turned off the water heater. Let's see if it works.

[javelin]

Well I don't know much about fireplaces but since it is a gas appliance my first guess is a protective high limit switch opens and turns off the gas. That could be because the fireplace air flow is restricted somehow (in or out) or inside needs a cleaning. The other thing is does your fireplace have variable temp switch (like a thermostat for the fireplace)? Maybe it has reached the set temperature and is just shutting off.......but could be a bad fireplace thermostat perhaps? The other guess is a flaky flame sensor....so it starts but just fails soon after.

[wrapped]

Our fireplace is electric make sure the timer is off,I have to bend over time see it. When you turn on it shows in top right hand corner.

[javelin]

I guess I should have assumed an electric fireplace (probably in most RV's with fireplace) and not propane. If we are talking electric, then similar restricted air flow and possibly high temp shutdown may result. Flaky fireplace thermostat might also cause short cycles; or failing fan/plugged filter if equipped. I would check all electric connections are clean and tight to the fireplace.

[m1noel]

Other than the restriction of the water heater, I have found that using the furnace at the same time as the fireplace will cause it to shut down. This is because the thermostat for the fireplace is in the back of the unit, in the cabinet with the furnace. The furnace heats up the cabinet and shuts the thermostat shuts down the fireplace. The fireplace works great in conjunction with the heat pumps.
Mike

[gmadams]

Most likely is that the electric hot water heater and the fireplace are on the same circuit. Turn off the electric on the hot water heater.