I have a gas fireplace, which I have not used in over 3 years. It starts with an on/off switch on the wall. When I turn it ON, nothing happens. I am kind of scared of trying anything with this as it works with gas and I don't totally understand how it works.
Any tips on checking some basic stuff to see if I can get it started before I call a professional?
Best Answer
It's difficult to help you troubleshoot a device, without a bit more information about it. Since you're not giving us much, I'll try to give general advice.
Depending on the system, there's a few things that could be wrong.
Gas Valve Closed
This would affect every type of gas fireplace.
Test:
If you hear the valve open (click, clank, clunk, etc.), but don't hear or smell gas. The valve may be off.
Most gas valves are quarter turn ball valves, so you can tell when they're open simply by looking at the knob. The knob should have an arrow, handle, or other linear feature on it. This feature should be aligned with (parallel to) the pipe, when the valve is open.
Solution:
Turn on the gas.
No Gas
If you get your gas from a tank or bottle, you'll want to make sure you have gas.
Test:
Similar to above, except that the valve will be open.
Solution:
Fill the tank.
Bad Switch
Since the system relies on a switch to know when to turn on, a bad switch could be devastating.
Test:
When the switch is toggled on way, you should measure infinity (or not hear a beep). When the switch is toggled the other way, you should get a measurement (or hear a beep).
Solution:
Replace the switch.
Pilot Not Lit
If your system requires a pilot, and it's not lit. You can flip the switch all you want, you'll never make fire.
Test:
If you see a flame, it's lit.
Solution:
Light the pilot.
Bad Flame Sensor
Fireplaces use flame sensors (thermocouples, thermopiles, etc.), to determine if there's a flame. If the sensor goes bad, the system will not hold the gas valve open.
Test:
As the thermocouple heats, you should get a reading on the multimeter.
Solution:
Replace the flame sensor.
Bad Gas Valve
If the system is getting all the right signals, but the gas valve is not opening. It could be a bad valve.
Test:
See test for Gas Valve Closed. You won't hear the valve open. You'll have to be sure the valve is getting the signal to open, so make sure all other items check out first.
Solution:
Replace the valve.
Depending on the type of fireplace, the ignition sequence will be a bit different. using the typical sequences below, you might be able to narrow down where the problem is.
Typical Gas Fireplace Ignition Sequence
Pilot
Electronic Ignition with pilot
Electronic Ignition