I have a Carrier 59SC2B. I think it is single stage.
I have had the unit for 3 winters now and this is the first winter that I am experiencing alot of problems. What is happening is: (the LED light is continuous throughout the whole process and never lights any error code. Flame sensor has been cleaned)
- Furnace gets a call for heat from thermostat
- The Inducer blower motor then starts
- The igniter lights up bright orange
- the igniter shuts off without any flame
- inducer continues to run
- igniter lights up again and then dims without any flames
- heavy water gurgling, or bubbling sounds from condensate trap
after some time (~1 hour), if without any intervention, the flames start and indoor blower fan starts.
a. If I go into the unit and pull out the interior condensate drain pipe, wiggle/jiggle the water out, plug it back in, the flames start on the next igniter light. (Is this pipe supposed to be pitched downward toward the PVC drain? It looks 100% flat/horizontal)
Is it the condensate drain? I took the condensate trap out to clean it already, its fairly good. Is it because somehow this winter I am experiencing abnormal levels of condensate and the furnace is simply doing what its supposed to?
EDIT (1/26): It is taking 1 hour again and I have called a HVAC tech to come in but I am worried he probably won't find anything because given enough time, the furnace starts to work. I've made a video of what is happening, perhaps someone has seen this before. It is recorded as soon as I restart the furnace and the induction motor kicks in. https://www.youtube.com/watch?v=aH7Dtx3Ht5U