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    bu2303's Avatar
    bu2303 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Feb 27, 2011, 11:59 AM
    FAU will not light
    I've replaced the thermocouple and gas valve. All safety sensors appear to ohm properly. I'm just such a cheap bastard, I will keep wearing coat and gloves in the house before I call for a service repair. Anyone have any ideas? Yes, the filter is clean.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #2

    Feb 27, 2011, 07:08 PM
    Make and model of the system will help. Gas valves do go bad. Do you have a strong flame from the pilot on the themocouple(not a so, so flame)? If so do you have two wires that plug in under the thermocouple you may have a limit blown and open. Good flame on the thermocouple and the pilot goes out as soon as you let off the valve--Bad safety switch in the valve. You will need to replace the gas valve.
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