My furnace comes on but blower won't shut off once the heat is achieved if I don't shut it off @ the breaker it will be 90 degrees the actual furnace clicks off @ temp you want but fan continues it's a coleman electric furnace/presidential serial# 47316240 model #6806A732-ive tried 2 replace thermostat even when thermostat is disconected it still stays on/running! Please Help Me this is in my Dads mobile home he is 87 and can not continue 2 keep manually shuttn off its either 90 or 40 degrees Thank-You::o

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