Why doesn't my gas fireplace light up?

How do I check for the gas fireplace problem?

It's difficult to help you troubleshoot a device without a bit more information about it. Since you are not giving us much, I will try to give general advice.

Depending on your system, some things can be wrong.

This would apply to any type of gas fireplace.

Exam:

  1. Find the gas valve.
  2. Turn on the switch.
  3. Make sure that the valve opens.

If you hear the valve opening (click, clink, clink, 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 from the button when they are open. The button should have an arrow, handle, or other linear feature. This function should be aligned (parallel to) the line when the valve is open.

Solution:

Turn on the gas.

If you get your gasoline from a tank or bottle, make sure you have gasoline.

Exam:

Similar to above, except the valve is open.

Solution:

Fill the tank.

Since the system relies on a switch to know when to turn on, a bad switch can be devastating.

Exam:

  1. Label and remove the wires from the switch.
  2. Check the continuity via the switch in both positions.

With the switch toggled en route, you should measure infinity (or not hear a beep). If the switch is toggled the other way, you should get a reading (or hear a beep).

Solution:

Replace the switch.

When your system needs a pilot and it doesn't light up. You can flip the switch whatever you want, you will never start a fire.

Exam:

  1. Look at the pilot.

When you see a flame, it glows.

Solution:

Light the pilot.

Fireplaces use flame sensors (thermocouples, thermopiles, etc.) to determine if a flame is present. If the sensor is defective, the system will not hold the gas valve open.

Exam:

  1. Disconnect the thermocouple from the system.
  2. Set the multimeter to measure DC millivolts (mV).
  3. Connect the black wire to the button on the thermocouple.
  4. Connect the red wire to the copper part of the thermocouple.
  5. Heat the thermocouple with a flashlight.

When the thermocouple heats up, you should get a reading on the multimeter.

Solution:

Replace the flame sensor.

When the system receives all the correct signals but the gas valve does not open. It could be a bad valve.

Exam:

See test for closed gas valve . You do not hear the valve opening. You need to make sure that the valve is receiving the signal to open. So make sure that all other items are checked first.

Solution:

Replace the valve.

The firing order is slightly different depending on the type of fireplace. The following typical sequences may help you narrow down what the problem is.

pilot

  • The switch is thrown
  • When the pilot is lit (verified via a thermocouple or other flame sensor).
    • Open the main burner gas valve.
    • Wait (there may be an adjustable timeout or a fixed timeout).
    • If the main burner is on (check with another thermocouple or flame sensor).
      • Leave the main gas valve open.
    • Otherwise
      • Close the main gas valve.
      • Flushing system (in the case of a fireplace, this will likely be a timed wait).
      • Repeat the ignition (this can happen 0 up to too often, depending on the system) .
  • Otherwise

Electronic ignition with pilot

  • The switch is thrown
  • Open the pilot gas valve.
  • Initiate electronic ignition device (spark gap, hot surface, etc.).
  • Waiting.
  • When pilot flame is detected.
    • Open the main burner gas valve.
    • Waiting.
    • When the main burner flame is detected.
      • Keep the main gas valve open.
    • Otherwise
      • Close the main gas valve.
      • Flushing system.
      • Repeat the ignition.
      • If no ignition occurs after trying again
        • Close the pilot gas valve.
        • Lockout (this may require a physical reset or a simple timed lockout).
  • Otherwise
    • Close the pilot gas valve.
    • Flushing system.
    • Repeat the ignition.
    • If no ignition occurs after trying again
      • Close the pilot gas valve.
      • Lockout.

Electronic ignition

  • The switch is thrown
  • Open the main burner gas valve.
  • Initiate electronic ignition device.
  • Waiting
  • When a flame is perceived.
    • Keep the main gas valve open.
  • Otherwise
    • Close the main gas valve.
    • Clean.
    • To repeat.
    • Lockout.

Ved

wow thanks for the detailed answer, so far i think my pilot is not lit, i still have a lot of this information to go through so i will check and get back to you ... thanks again