I took the panel off and do not see any burnt wires. I believe I know what the sequencer is, but how do I test it to see if it is bad. I am not sure what the contactor looks like. Can you help?

I have a Intertherm Mac 2241A electric furnace. One day I noticed smell like burning wire and the outside of the furnace was hot to the touch. I turned off the breaker and waited for it to cool down. I waited a couple of days and turned the unit back on and it seemed to work fine. The next day when ...