I posted a question before about how my ignitor kept going out. Well after replacing the ignitor again last night and the furnace not working again this morning, we tested one of the old ignitors. I guess it hasn't been the ignitor after all because when one of the old ones was plugged into 120 it fired right up to a bright orange glow. Does anyone have suggestions as to what to check next? Could it be the control module?

Thanks for any help I can get:)

Check for voltage at the control board where the ignitor is pluged in. When you stert the furnace power should be there in short order when calling for heat. If no power at the board then it could be a bad board or another device in the system.

What type of furnace is this?

Sorry, it is a 2000 Amana.

Do you own a voltage meter?

Yes, I'm a licensed electrican.

"Did anyone stay at a Holiday Inn Express last night?"

Ok, power the furnace down, unplug the ignitor, stick your tester leads into the plug and power the furnace up. Do you have 120volts?

"Did anyone stay at a Holiday Inn Express last night?"

No,did you?

I will get down in the crawl space now and check it out, may take a few.

Ok, let us know what you find.

Went down to test using a Fluke D.M.M. and it read 113 V across the leads for about 7 seconds then dropped to zero. Hooked ignitor back in and it fired right up. Turned furnace off and on three times and it continued to work each time. Very confused as to why it will ignite when messed with but will not reignite during normal cycling. Does this help?

I'm guessing something else is going on here. Something is probably holding it out, like a pressure switch not properly closing would be my guess. Is this a 90% furnace?

I'm not sure, it says Amana 80 Series.

Metal or plastic exaust vent?

Metal

Ok, Can you locate the pressure switch? Round and silver, rubber tube runs from the switch to the draft fan.

This unit is in the crawl space. Moisture could have got to some contacts and on a temporary basis stopped the unit from working. Now that the contacts have been disturbed (unplug and plug in ignitor for example) it is working. If it fails again post back since like hvacservicetech 07 said the vac/pressure switch or other components could also be having a problem. Get the exact model number when you are down there and post for the record.