Model reference
Lennox G32-5
Furnace
1 document15 error codes6 service modes
Available documentation
Service Manual
- G32 SERIES UNITS Service Literature56 pg
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Error codes (15)
CodeMeaning
DS1: OFF / DS2: Fast FlashHigh-fire pressure switch open; or blocked inlet/exhaust vent; or high pressure…DS1: OFF / DS2: Slow FlashLow-fire pressure switch open (G32Q-75 only); or blocked inlet/exhaust vent; or…DS1: Slow Flash / DS2: ONPrimary limit or rollout switch openLED1: Alternating Fast Flash / LED2: Alternating Fast FlashImproper main ground, broken ignitor, open ignitor circuit, or line voltage…LED1: Alternating Slow Flash / LED2: Alternating Slow FlashWatchguardLED1: Fast Flash / LED2: Slow FlashMain power polarity reversed.LED1: OFF / LED2: ONCircuit board failure or control wired incorrectly.LED1: OFF / LED2: Slow FlashPressure switch open or has opened 5 times during a single call for heat; or…LED1: ON / LED2: ONCircuit board failure or control wired incorrectly.LED1: ON / LED2: Slow FlashRollout switch open or 9-pin connector improperly attached.LED1: Simultaneous Fast Flash / LED2: Simultaneous Fast FlashNormal operation, signaled when heating demand initiated at thermostat.LED1: Simultaneous Slow Flash / LED2: Simultaneous Slow FlashPower on, normal operation; also signaled during cooling and continuous fan.LED1: Slow Flash / LED2: Fast FlashLow flame signalLED1: Slow Flash / LED2: OFFFlame sensed without gas valve energized.LED1: Slow Flash / LED2: ONPrimary or secondary limit open; limit must close within specified time or…Service modes (6)
- Cooling Fan Off Delay Adjustment (G32-5+)Dip switch 4 on integrated control board
- Fan-Off Time Adjustment (G32-1 to -4)Locate dip switches on SureLight integrated control board. Flip dip switch to desired fan-off time…
- Heating Fan Off Delay Adjustment (G32-5+)Set dip switches 1 and 2 on integrated control board
- Second Stage Delay Adjustment (G32-5+, Single-Stage Thermostat)Dip switch 3 on integrated control board
- Thermostat Selection (G32-5+)Position jumper E20 on integrated control board
- Two-Stage Mode Selection (G32-1 to -4)Locate jumper on two-stage control board (A86). Set jumper to desired mode
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