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Most Common Fixes
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Furnace Error Code Lookup Tool: All Brands
Master furnace error code lookup guide covering Carrier, Goodman, Lennox, Trane, York, Rheem, Bryant, Heil, Amana, Coleman, and more.
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Ice Machine Error Code Lookup: All Brands
Master ice machine error code lookup guide covering Hoshizaki, Manitowoc, Scotsman, Ice-O-Matic, Follett, and more.
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Industrial Equipment Error Code Database: Master Reference
Master reference hub for industrial equipment error codes covering HVAC, refrigeration, VFDs, CNC controls, boilers, pumps, compressors, and commercial kitchen equipment.
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Mini Split Error Code Lookup: All Brands
Master mini split error code lookup guide covering Daikin, Mitsubishi, Fujitsu, Gree, LG, Bosch, Cooper & Hunter, and more.
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VFD Fault Code Lookup: All Brands
Master VFD fault code lookup guide covering ABB, Danfoss, Siemens, Schneider, Mitsubishi, Yaskawa, Allen-Bradley, and more.
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Hoshizaki Ice Machine E1 Error Code — Water Inlet Fix
Hoshizaki E1 error code means the ice machine has a water inlet problem. This guide covers float switch, inlet valve, and water supply fixes for Hoshizaki commercial ice makers.
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Fanuc Alarm 300 — APC Alarm Fix (Absolute Encoder)
Fanuc Alarm 300 is an APC (Absolute Pulse Coder) alarm on the absolute encoder. This guide covers battery replacement, encoder initialization, and board-level diagnosis.
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Mitsubishi Mini Split E6 Error Code Fix
Mitsubishi mini split E6 error code means a communication failure between the indoor and outdoor units. Here's how to diagnose wiring, boards, and connection issues.
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Carrier 13 Error Code — Limit Switch Lockout Fix
Carrier error code 13 means the limit switch tripped due to overheating. This guide covers every cause and fix — from clogged filters to cracked heat exchangers.
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Carrier 21 Error Code — Gas Heating Lockout Fix
Carrier error code 21 signals a gas heating lockout — the furnace failed to ignite after multiple attempts. Learn the exact steps to diagnose and reset it.
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Carrier 34 Error Code — Ignition Proving Failure Fix
Carrier error code 34 means ignition proving failure — the furnace tried to light but couldn't confirm a flame. Here's how to diagnose and fix it fast.
Most popular fixes this week
Auto-updated from real reader traffic, refreshed weekly.
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All Fix Guides
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Daikin H8 Error Code - Causes & Fix
H8 means DC current sensor fault in the outdoor unit's inverter. Most common fix: replace the outdoor unit inverter PCB board.
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Yaskawa A1000 VFD AL-29 - Causes & Fix
AL-29 does not exist in Yaskawa A1000 documentation. Likely a misread code (CPF29 control circuit error) or third-party alarm label.
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ABB ACS580 A3A2 Fault - Causes & Fix
A3A2 means DC link undervoltage: the drive's internal DC bus is too low. Most often a blown input fuse or missing phase.
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Goodman Heat Pump E5 Error - Causes & Fix
E5 on Goodman heat pumps means low-pressure fault or wiring short (model-specific). Most often a refrigerant leak or pinched wire.