Per homeowner description of the problem, the exhaust motor would run but nothing else would happen. After morning appointments he returned home and the temperature was 58. System was turned off and front cover doors were off upon arrival today Philco /Nordyne 90+ system turned on in fired off after the initial inspection and ran like normal. Resurface flame sensor and blowout drain trap Temperature rise is exceeding the recommended 45 to 75 and reaching 80°+ at 150 supply temperature with 69 return The exhaust pipe drain trap has a broken nipple that was reattached and resealed today. The exhaust motor has chirps and rattles that come and go that are not normal. Cleaning and lubrication of the motor and bearings made no difference to the sound. Visual inspection through the exhaust pipe rubber transition boot confirmed nothing visible or large enough to lodge itself in the motor housing. Gas valve does not have any manifold adjustments for pressure and blower assembly is already s