Customer states that upstairs unit is not operating providing and error code 228. Upon diagnosis found that unit was firing upon a rival to home, performed basic testing on unit and determined that inducer motor is pulling half an amp at 90% capacity during modulating sequence manufacture states motor should be pulling close to 1.0amps. Also due to this weaken motor the pressure switches could have built up water in diaphragm causing this improper calibration. Will present customer with options, unit currently firing. Customer opted not to proceed with repair at this time, rather he would also like system design specialist to come out and provide estimate on an 80% furnace in attic.
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