HVAC, Appliance, CNC, and VFD Error Code Repair Guides
Browse repair guides for HVAC, appliances, refrigeration, CNC alarms, VFD faults, generators, boilers, water heaters, and commercial equipment.
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Frigidaire Washer E20 Error Code — Drain Problem Fix
Frigidaire washer E20 means the machine detected a drain problem. Clean the pump filter first — it fixes E20 in most cases and takes about 5 minutes.
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Frigidaire Washer E21 Error Code — Long Drain Fix
Frigidaire washer E21 means the machine took too long to drain completely. Clean the pump filter and check the drain pump — it's usually a partial blockage.
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Bosch Dishwasher E01 Error Code — Heating Circuit Fix
Bosch dishwasher E01 points to heating-circuit trouble. Check the heater relay, control board, wiring, NTC sensor, and wash motor.
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Bosch Dishwasher E09 Error Code — Heating Element Fix
Bosch dishwasher E09 means heating element failure on many models. Check the heat-pump assembly, wiring, relay, and water circulation.