Furnace is not working :-(

[Coleus]

Originally Posted by The Codfather

Ill pm you my number.
First I would do a hard reset on the module, there should be a power switch near your furnace. Just shut it off and turn it back on. This should reset the module, and the furnace will start through a cycle.
If a safety switch was tripped it will try to fire again, if the manual reset switch was tripped(flame rollout switch) it will have to be manually reset, this off course is telling you a bigger problem though. I would watch the furnace, just to get the temp up in the house but would definitely call someone in if this happened, as there is a problem that has to be solved.
Make of furnace and age will help me as well.
Furnace should go through a pre-purge from anywhere from 30-90 secs before trying to fire.
It may be something as easy as the door has vibrated loose and it cut the power to the gas valve.
On newer furnaces there is a troubleshooting led light that will flash the problem, might be worth a look as well.

Thanks everyone for your help especially Tony and Bob . It is awesome to have member like this on this board. Anyway, a furnace guy called me back and he came.

Well, the problem is the safe switch has burned out because i did not replace filter soon enough ( i only replace filter when my thermostat tell me Lol) apparently you have to replace those stupid expensive 3M filter more frequently than the cheaper one. So he advised me buy a cheap filter and replace it more frequently.

So now he is going to get part and get it replaced.

Total damage: 200 bucks :-)

Lesson learned: replace your furnace filter frequently and don't buy expensive filter.

Also, i think it also part of the HRV, I did not have to replace my furnace like 6 months and it was still kind of clean before i got my HRV installed. So if you have HRV installed, i think you have to replace filter more frequently. Bob, what do you think?