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Old 01-12-2012, 11:12 AM   #1
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Clare furnace won't start


I have a clare furnace that will not start. When I turn the thermostat up to call for heat nothing happens. It should start up the vent fan first but it doesn't. If I move the lever from auto to fan the main blower will come on but nothing else. I am not getting any power to the vent fan at any time. It is a natural gas furnace with a s8610u controller

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Last edited by long3817; 01-12-2012 at 11:15 AM. Reason: added more information
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Old 01-12-2012, 12:17 PM   #2
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Clare furnace won't start


Faulty thermostat, thermostat lines, vent motor, capaciter (if it has one) or board are the most likely causes. Do you have a electrical meter?

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Old 01-12-2012, 12:35 PM   #3
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Clare furnace won't start


I went to one yesterday, blower and cool worked from stat but lockout in heat. Carrier. Failed ignitor.
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Old 01-12-2012, 12:44 PM   #4
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Clare furnace won't start


remove the stat off the subbase and jump W to R don't worry about the settings on the subbase..this should give you a straight heat calll..if nothing again not even the ID motor as you see as the first thing to run the problem is on the control module
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Old 01-12-2012, 12:44 PM   #5
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Clare furnace won't start


The vent motor itself is not getting power to it. I have changed the thermostat which has not helped
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Old 01-12-2012, 12:46 PM   #6
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Clare furnace won't start


and yes I have a multimeter. That is how I know it is not getting power.
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Old 01-12-2012, 04:14 PM   #7
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Clare furnace won't start


Check if the limits and roll out switches are closed. If the stat is calling for heat and the safeties are closed but still no power to the inducer motor then it's a control board issue.
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Old 01-12-2012, 06:11 PM   #8
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Clare furnace won't start


these furnaces were notorious for a failed sequencer that controls the inducer. Last time I tried to get one they were still available but in short supply. ICP (inter city products) now owns that line of parts.

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