MAYTAG MG2R Gas Furnace
Contents
For 80+ and 90+ Single Stage Furnaces
Refer to the Installation Instructions provided with the furnace for the proper heating and cooling speeds for your application.
| Red LED Flash | Error/Condition |
| Flash codes stored in memory (auto-erased after 14 days) | |
| 1 | System Lockout (Retries Exceeded) |
| 2 | Pressure Switch Stuck Closed |
| 3 | Pressure Switch Stuck Open |
| 4 | Open High Temperature Limit Switch |
| 5 | Flame Sensed>4.25 Seconds with Gas Valve De-Energized |
| 6 | Open Flame RO Switch |
| 8 | Ignitor Relay Error |
| 10 | Open Fuse |
| 11 | Ignitor Open |
| 12 | Inducer Relay Error |
| Flash codes NOT stored in memory | |
| 7 | Low Flame Sense Signal |
| 9 | Twinning Fault |
| Off | Control Failure / No Power / Internal Fault / IRQ Loss |
| Gas Heating Lockout (Gas valve energized when it should be de-energized) | |
| Or Gas valve De-energized when it should be Energized | |
| Rapid Flash | Reverse Polarity |
| Continuous On | Normal Operation |
If any of the original wire as supplied with the furnace must be replaced, it must be replaced with wiring material having a temperature of at least 105 C.
Use copper conductors only.
| Cool Motor SPEED DIPSWITCH SETTING (S1-1, S1-2, S1-3) | |||||||||||||||||||||||||
| 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 | 1 | 2 | 3 | ||
| Position | OFF OFF OFF | ON OFF OFF | ON ON OFF | OFF ON OFF | OFF OFF ON | OFF ON ON | ON OFF ON | ON ON ON | |||||||||||||||||
| Motor SPEED Cool | Y | T1 | T2 | T3 | T4 | T1+T2 | T1 | T1 | T1 | ||||||||||||||||
| Heat Motor SPEED DIPSWITCH SETTING (S2-1, S2-2) | |||||||||
| 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | ||
| Position | OFF OFF | ON OFF | ON ON | OFF ON | |||||
| Motor SPEED Heat | W | T1 | T2 | T3 | T4 | ||||
| Fan Motor SPEED DIPSWITCH SETTING (S2-3, S2-4) | |||||||||
| 1 | 2 | 1 | 2 | 1 | 2 | 1 | 2 | ||
| Position | OFF OFF | ON OFF | OFF ON | ON | ON | ||||
| Motor SPEED Fan | G | T1 | T2 | T4 | T1+T2 | ||||
WIRING DIAGRAM
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