Thermal Zone (Nordyne) not starting

[Skunkbear]

Furnace Model GU060m12A-S will work at times but not at others. History - Furnace stopped a couple of days ago, I was getting an error of 3 red flashes which means "pressure switch closed with inductor on". If I remove the down draft vent this goes away but the furnace will stil not work all the time. This afternoon I replace the hot surface ignitor (because I broke the other one) and it ran for about 4 cycles now the furnace goes until the ignitor glows I can hear the gas flow thru the valve (honeywell) but no ignition.
Any ideas?

[Robert]

Start at beginning and deal with the pressure switch problem.

Could be a bad pressure switch, clogged or damaged vent air pipe, bad inducer motor, clogged, kinked, loose or damaged pressure tubes.



Thanks,
Robert