[maple man]

I havr a carrier model
58sx120-lg-1
When I turn the system on at the thermostat the power vent fan comes on but I never get any spark or pilot light.
I replaced the spark ignitor, but it seems as if it's not getting any power.
Any ideas on what I should check next would be greatly appreciated.

 

[danpik]

It is posible that the pressure switch is not closing. A Volt meter can be used to see if it closing properly. Most likely cause is a clogged tube or a plugged exaust.

 

[maple man]

furnace

I will have to check it out