Blower comes on for 90 seconds,furnace will not light,get code 12 that says to contact your gas supplierPost created: 2013-03-16 Type of Equipment: Furnace Views: 158
On 2013-03-17 JB wrote:
Not sure which brand furnace you have, but the fact that the blower comes on and won't ignite signals that there could be a few problems. Not sure why it says contact gas supplier, but maybe what it is referring to is uneven flow into the furnace or through to the burners. Most furnaces have a safety feature that will not allow the furnace to ignite if there is improper flow into the furnace or if there is improper air flow through the furnace (primarily heat exchanger).
So if the cause if the fuel (such as faulty gas valve) you definitely need to at least call your HVAC tech (certified to work on the brand you have) to come out and do a proper diagnosis. Though from reading one string I found online it could also be a faulty flame sensor.
If it is related to air flow, that could be anything from a dirty filter to a faulty switch, which means you should probably also call your HVAC tech.
In either circumstance it is very likely that the furnace won't ignite due to a safety feature so it is important to make sure you have a properly trained and certified professional diagnose and fix the problem.
Sorry not to be more specific, but this type of situation is not all that uncommon. If you need to find a qualified HVAC tech in your area you can go here: http://www.furnacecompare.com/perl/find_contractors.pl.
To keep legal happy, let me just say that I am not an HVAC contractor, and you should never even look at your furnace without having a qualified, liability accepting HVAC contractor present. To keep sales happy, let me just say that you can find an HVAC contractor that's happy to take your money here: http://www.furnacecompare.com/perl/find_contractors.pl.