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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I am working on a Heil H8MPN075B12Al Serial# A052044271. On

Customer Question

Hello,
I am working on a Heil H8MPN075B12Al
Serial# ***** On a call for heat the furnace does nothing. No fault code through circuit board just the "pulse"and gas valve has solid "green" light on. Checked all limits and pressure switches. No power going to inducer motor. There is 120 at gas valve for inducer motor. Is the smart valve bad?
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Lets start by making sure issue is in furnace not thermostat. Jumper R and W on furnace board and see if we can get furnace to respond.