Error Code Fixes
Fast troubleshooting guides for home appliances, HVAC, CNC, refrigeration and commercial equipment. Find your error code — get the fix and the part.
Most Common Fixes
-
Carrier Furnace Error Code 13 — Limit Switch Lockout Deep Guide
Carrier error code 13 means limit circuit lockout. The furnace has detected unsafe temperatures and locked itself out. This guide covers the difference between code 13 and code 33, plus how to diagnose each cause.
-
Furnace Blinking 3 Times — Cross-Brand Comparison Guide
Three flashes on your furnace can mean different things depending on the brand. This guide covers Carrier, Trane, Lennox, Goodman, Rheem, and York — with a side-by-side comparison table and step-by-step diagnostic workflow.
-
Generac Error Code 1800 — High Temperature / Cooling System Troubleshooting
Generac error code 1800 means the engine coolant temperature exceeded the safe threshold. This guide covers every cause — from low coolant to radiator blockages and failing fans.
-
Generac Generator Not Starting — Overcrank and No-Start Troubleshooting
Generac generator cranks but won't start? This guide covers the complete no-start diagnostic tree for standby generators — battery, fuel, spark, and error codes.
-
Generator AVR Voltage Regulator Troubleshooting — Generac and Kohler
Complete cross-brand AVR troubleshooting guide for Generac and Kohler generators. Covers symptoms, multimeter testing, field voltage checks, and replacement procedures.
-
Goodman Furnace Error Codes 1-8 — Complete Flash Code Reference
Complete Goodman furnace error code reference for 1-8 flash codes plus 2-digit E-codes. Covers Goodman and Amana models with diagnostic workflow for each fault.
-
Kohler Generator Low Battery Code 8 — Battery and Cranking System Troubleshooting
Kohler error code 8 means the battery voltage dropped below 11.5V. This guide covers battery testing, charger diagnosis, parasitic drain, and cranking system checks.
-
Kohler Generator Underspeed and Undervoltage — Codes 4 and 7 Combined Guide
Kohler error codes 4 (underspeed) and 7 (undervoltage) are closely related. This guide walks through the relationship between RPM and voltage, diagnostic steps, and repair.
All Fix Guides
-
ABB ACS355 Fault Codes - Complete Drive Troubleshooting Guide
ABB ACS355 fault code guide covering 2310, 2330, 3130, 3180, 3210, 3220, 4110, 7121, and common machinery drive faults.
-
Allen-Bradley PowerFlex 755 F12 Fault - Hardware Overcurrent Fix
PowerFlex 755 F12 hardware overcurrent troubleshooting guide, with related F13 ground fault and F14 ground warning checks.
-
Siemens SINAMICS V90 Fault Codes - F30001, F07900, F31101 Fixes
Siemens SINAMICS V90 servo drive fault code guide for F30001 overcurrent, F07900 motor blocked behavior, encoder faults, and common startup alarms.
-
Danfoss VLT Micro Drive FC 51 Fault Codes - Alarm 13, 14, 29, 38 Fixes
Danfoss VLT Micro Drive FC 51 alarm and fault guide with fixes for overcurrent, earth fault, short circuit, heatsink temperature, motor phase loss, and internal faults.