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I have a Miller( by Nordyne) Induced draft residential gas furnace(90 %) Model # G5RC080C-16 80,000 btu. It will run until stat. is satisfied, then when stat. calls for heat it tries to cycle several times with out success, the inducer motor keeps running and I get a one flash error code( problem in control circuit).I replaced the limit switch located on the inducer housing 2 years ago, and it's ran fine until a couple months ago.I checked that limit and all the other ones on the unit and they are working. Any info would be greatly appreciated!
 

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when it throws the error code, limit circuit, does the blower run continuously?
 

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Check with a volt meter to see if the gas valve is getting 24 volts ac. during the call for heat cycle. Check the circuit diagram and work back from the gas valve through the safety switches until the 24 vac shows up.
 
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