I'm having high limit switch problems.
I have tested three so far and all have the same problem. If they are connected I don't get any combustion. The combustion fan runs but the combustion doesn't kick in. If I run a direct conection with a wire I don't get any combustion.
If I disconnect one of the terminals on the high limit switch so that the circuit is open I get combustion. In other words I am bypassing the switch.
I'm thinking the problem may be with the control board...
If someone could give me some feedback that would be great.

ernie