I noticed cold air from my Carrier 58SS furnace. The main burners were not lighting. The pilot flame was strong, but yellow.
When I tapped on the gas valve, the pilot shut off. I removed the pilot tube to clear any possible blockage.
I also removed and replaced the 3-Wire (used previous sparker) When everything was back together, switched on the power. The inducer fan ran for 4 minutes. No spark. I shut it off the power.
What might the problem be?
