I have a 1995 Coleman Evcon gas furnace and the green light flashes four times. Instructions say 'limit cycling'. I replaced the limit switch but it didn't help - still flashes four times. The unit lights but the blower doesn't come on and it doesn't shut down. Could the new switch be bad or are there other things I should be checking? Thank you.

Sounds like you have a bad fan motor, or control board. Is the fan motor getting power?

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Originally Posted by GingerH

I have a 1995 Coleman Evcon gas furnace and the green light flashes four times. Instructions say 'limit cycling'. I replaced the limit switch but it didn't help - still flashes four times. The unit lights but the blower doesn't come on and it doesn't shut down. Could the new switch be bad or are there other things I should be checking? Thank you.

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If you mean the burmers don't shut down don't run it! If you mean the fan and inducer that's normal, you just may have a hcracked heat exchanger call utility to test for it.

I saw the blower never runs? Is this limit a temp delay combo unit? If so its wired wrong or fan motors bad manually advance it to see if fans running then, or jumper the wires to test it.