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Figure 44. Gas Direct Ignition Furnace, Heating & A/C Ready - All M1M Models
Steady ON Control OK Steady ON Good Flame Signal
Steady OFF No power Blinking Weak Flame Signal
Rapid Flash False flame or internal control fault Steady OFF No Flame Signal
1 Flash Limit switch is open
2 Flashes Pressure switch is open with inducer on
3 Flashes Pressure switch is closed with inducer off
4 Flashes Lockout due to failed ignition
5 Flashes 115 vac & neutral reversed or no ground
1. Incoming power must be polarized. Observe color
coding. (See furnace data label for electrical
information.)
2. If any of the original wires (as supplied with the
appliance) must be replaced, use 105˚C Thermoplastic
type wire or its equivalent.
WIRING DIAGRAM