How to test a White Rogers 2 stage gas valve?


Old 09-27-08, 02:01 PM
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How to test a White Rogers 2 stage gas valve?

Hi, I have a Magic Chef Furnace with a Robertshaw Ignition Module and White Rogers Gas valve. The problem is that the gas valve will not open to start to flame to the furnace. If you turn up thermostat, I then get spark and then a pilot light. Then nothing. I have replaced the Ignition Module and then replaced the gas valve and still the same. I could have another bad Ignition Module and or Gas Valve. I need to know how to test the gas valve to see if it is there. I do see voltage changes from the Ignition module so leads me to the gas valve still. The gas valve is two stage module. I am a Electrical and Mechanical Tech so working on this is no problem, but cannot find any information to test this out, Any information will be appreicated. Thanks, Paul
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Old 10-06-08, 02:05 PM
Join Date: Dec 2004
Location: San Jose,Ca
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Check for voltage at the valve. If no voltage at valve, time to check flame rod. Remove flame rod and clean with something not very abrasive. If still no go check module ground. Are you able to take a micro-amp read on the flame rod?
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