nordyne gas furnace wiring diagram | Wirings Diagram Tag: nordyne gas furnace wiring diagram Gas Furnace Wiring Diagram – carrier gas furnace wiring diagram, coleman gas furnace wiring diagram, gas furnace wiring diagram, Every electrical structure consists of various diverse parts. Each part should be placed NORDYNE MGHA SERIES INSTALLATION INSTRUCTIONS MANUAL The p/n 903092A 2-wire and p/n 902898A A/C Heat Pump (4 to 7 wire) Relay Boxes install with cur- rent M1, MGHA and MMHA models of NORDYNE gas furnaces with the new standardized blower assembly. The 2-wire Relay Box has control switches which are operable through an opening in the furnace door on MGHA and MMHA furnaces. Nordyne Furnace: Model M1MB 070A BW Parts & Repair Help Find all the parts you need for your Nordyne Furnace M1MB 070A BW at RepairClinic. We have manuals, guides and of course parts for common M1MB 070A BW problems.