
© 2021 Staheli West
133
Faults
Fault 1229: Furnace Door Temp is High Alarm (190F)
Fault 1230: Furnace Door Temp is High Warning (180F)
Causes
Troubleshooting
Fixes
• Failed insulation board/rope-
gaskets.
• Check condition of rear furnace
door insulation by removing the
burner gun assembly and looking
through the burner blast tube.
The rear door insulation should
not have significant cracks or
breaks.
• Use infrared thermometer to
check rear furnace door.
• Check the rear furnace door for
paint bubbling and discoloration
from excessive heat.
• Replace rear furnace door
insulation and rope gaskets.
• Faulty sensor.
• Use infrared thermometer to
check rear furnace door area for
normal temperatures.
• Replace sensor.
• Faulty wiring.
• Inspect the wiring for ground,
continuity, and proper voltage.
• Repair/Replace wiring.
Fault 1231: Ambient Temp Sensor Not Connected
Indicates ≥0.5 volts is not present on the signal wire.
Causes
Troubleshooting
Fixes
• Sensor disconnected.
• Connect sensor.
• Faulty sensor.
• Swap with compatible sensor
(See sensor page).
• Replace sensor.
• Faulty wiring.
• Inspect the wiring for ground,
continuity, and proper voltage.
• Repair/Replace wiring.
Fault 1232: Ambient Temp Sensor Voltage High
Indicates >4.5 volts is present on the signal wire.
Causes
Troubleshooting
Fixes
• Faulty sensor.
• Swap with compatible sensor
(See sensor page).
• Replace sensor.
• Faulty wiring.
• Inspect the wiring for ground,
continuity, and proper voltage.
• Repair/Replace wiring.
Summary of Contents for DewPoint 331
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