Rank: Member
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Joined: 4/10/2009(UTC)
Posts: 8
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I got one load through and now, no heat! Have checked the heat sensor on blower housing and the fuse on the inside rear panel. Fuse showed 0, sensor about 3 ohms. Also checked 2 ceramic fuses (?) on top of the unit where the gas comes in; they show a couple of ohms each. What else can I check?
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Rank: Advanced Member
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Joined: 7/19/2007(UTC)
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I would check for continuity the igniter, the safety thermostat (#33 on the diagram), the flame sensor (#79 on the diagram) and the temperature selector switch (as shown on the wiring diagram). Post the results. Gene.
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Rank: Member
Groups: Registered
Joined: 4/10/2009(UTC)
Posts: 8
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OK, #33 I'd already checked (thought it was a fuse). Should it read 0 or a couple of ohms? The flame sensor will require a very short PHillips screwdriver which I'll have to borrow.
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Rank: Advanced Member
Groups: Senior Expert, Administrators
Joined: 7/19/2007(UTC)
Posts: 27,455
Was thanked: 4 time(s) in 4 post(s)
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The continuity test should show close to zero reading for a closed circuit. You can find more information from the article on our forum - [COLOR="Blue"]How To Check Continuity With Ohmmeter[/COLOR]. Gene.
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