main gas valve pressures furnace

I have a Superior GHC-5500NE-2 electronic ignition gas fireplace with Robertshaw SP745 ignition module. When the wall switch is flipped the ignitor clicks and pilot valve opens lighting the pilot but main valve never opens and it all shuts down. I do NOT see a sensor of any kind with the pilot....

I have a Superior GHC-5500NE-2 electronic ignition gas fireplace with Robertshaw SP745 ignition module. When the wall switch is flipped the ignitor clicks and pilot valve opens lighting the pilot but main valve never opens and it all shuts down. I do NOT see a sensor of any kind with the pilot....

We have a Carrier Weather Maker 8000 Natural Gas Furnace not functioning properly. We have replaced pressure switch, hot surface ignitor, flame sensor and control board. It will cycle 3 to 4 times and then not come back on. Is it possibly a bad coil on gas valve?:rolleyes:

I have an American Standard Furnace Freedom 80 Comfort-R The Main Gas Valve Solenoid does not energize, no 24volts from the "Pressure switch 2nd stage". . The "lo fire" 1st stage solenoid ALWAYS gets 24v after pilot light is on for 20 seconds. The "hi fire" 2nd stage solenoid does not get 24v...

I have a carrier 58gs100ga furnace with a white rodgers 36e93 gas valve. The main gas valve solenoid chatters or rattles for a split second before it stays engaged after the pilot is proved. I just replace the spark/lock out board and the fan board for a different problem. This chatter is...