Trouble with Air Ease Ultra furnace

Old 12-09-13, 06:59 PM
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Trouble with Air Ease Ultra furnace

I have a ultra ease model#G1N80AR1000141B-1A. the thermostat calls for heat,the inducer motor comes on after 30 secs or so the ignitor glows and it fires up runs for about 40-60 secs. then the flame goes out then approx a minute later the inducer motor shuts down and I get three flashes from self diagnostics "pressure switch open when should be closed". I have tested for continuity at pressure switch while furnace cycles and I have continuity when inducer comes on and loses continuity when inducer shuts off. I would appreciate help in directing me what to look for to fix. I should add the blower motor never comes on even with thermostat set to "fan on".
Old 12-10-13, 05:40 PM
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If you have a voltmeter & know how to use it, start the furnace & measure voltage between the heating speed fan terminal & either neutral or ground. You should get 120 volts AC before the fire goes out. If you never get voltage, even after the furnace shuts down, I'd suspect the control board.

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