[moundtown]

I have an old Intertherm electric furnace model: MAC 2454A. It will not stop running. Two years ago the heating element would turn off but the fan kept running at which time I installed a new sequencer and that fixed the problem. Now neither the heater element nor the fan will stop running. I have disconnected the thermostat which made no difference. Any ideas to what might be causing this?

Thanks

 

[Doc Holliday]

fan relay/contactor is stuck.

 

[beenthere]

Sequencer stuck closed.

 

[blingbling]

Sequencer is stuck closed.

 

[moundtown]

Thanks all. Diagnosis seems to be unanimous, and as it turns out, correct as well. I removed the sequencer that I had installed just the winter before last and it tested bad. Replaced it with a new one and the problem is solved.

 

[Beto1975]

I am having the same issue with the same model number where do you find the sequencer

 

[6t7gto]

 

[6t7gto]

maybe?

https://www.amazon.com/621678-Intertherm-Aftermarket-Replacement-Sequencer/dp/B00FX6QK0K