Honeywell Gas Control Valve Troubleshooting. If it is, simply replace the igniter/flame rod assembly. Count to 20 and wait for the pilot light.
When the thermopile can’t do its job of producing enough current, called millivolts, to operate the control board in the gas valve, the control board won’t work, which causes the gas valve to close. When replacing the thermopile you must replace the entire pilot assembly. Count to 20 and wait for the pilot light.