Posts
All the articles I've posted.
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Trane 3 Flashes Error Code — Pressure Switch Fault Fix
Trane 3 flashes means the pressure switch failed to close or opened during operation. This guide covers diagnosis and fixes for the Trane furnace pressure switch fault.
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Carrier 43 Error Code — Rollout Switch Open Fix
Carrier error code 43 means the rollout switch has tripped due to flame rollout. This guide covers every cause and fix for the Code 43 rollout lockout on Carrier furnaces.
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Carrier 41 Error Code — Blower Motor Fault Fix
Carrier error code 41 means the blower motor is not operating correctly. This guide covers diagnosis and fixes for the ECM blower motor fault on Carrier gas furnaces.
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Daikin VRV / VRF U4 Error Code — Communication Fault Fix
Daikin VRV/VRF U4 error code means a communication fault between indoor and outdoor units. This guide covers wiring, PCB, and configuration fixes for U4 on commercial Daikin VRF systems.
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Copeland Compressor Error Code 1 — High Pressure Cutout Fix
Copeland compressor error code 1 means the high pressure safety cutout tripped. This guide covers how to diagnose and fix high pressure trips on Copeland scroll compressors in commercial refrigeration and HVAC systems.
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Weil-McLain Boiler Error Code E01 — Lockout Fix
Weil-McLain boiler error code E01 means the boiler locked out after repeated flame failures. This guide covers every cause and fix for E01 on Weil-McLain gas boilers.
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VFD Fault Codes OC, OV, UV, OL — Complete Fix Guide
VFD fault codes OC (overcurrent), OV (overvoltage), UV (undervoltage), and OL (overload) are the most common drive faults. This guide covers causes and fixes for all four across ABB, Yaskawa, Danfoss, and Siemens drives.
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ABB VFD Fault 2201 — Overcurrent Fix
ABB VFD fault 2201 means overcurrent during acceleration on ACS550, ACS310, and ACS355 drives — here's how to diagnose and fix it.
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Allen-Bradley PowerFlex VFD Fault F7 — Motor Stalled Fix
Allen-Bradley PowerFlex VFD Fault F7 means motor stalled — here's how to diagnose and fix it on PowerFlex 4, 40, and 400 series drives.
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Burnham Boiler E1 Lockout Code Fix
Burnham boiler E1 lockout means the burner failed to ignite after the maximum number of attempts. This guide covers every cause and fix — gas, ignition, and control board.
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Heatcraft Refrigeration Alarm 1 — High Temperature Fault Fix
Heatcraft refrigeration Alarm 1 means high box temperature on Bohn, Larkin, and Climate Control walk-in unit controllers — here's how to diagnose and fix it.
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Honeywell Thermostat E1 Error Code — Sensor Fault Fix
Honeywell thermostat E1 error code means an internal sensor fault on T6, T9, and T10 Pro series — here's what it means and how to fix it.
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Hussmann Refrigeration Display Case Error Code 88 — Sensor Fault Fix
Hussmann refrigeration display case error code 88 means a temperature sensor open circuit fault — here's how to diagnose and replace the NTC sensor.
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Lennox Error Code 414 — Gas Valve Circuit Fault Fix
Lennox error code 414 means a gas valve relay or circuit fault on G61, G71, and EL296 series furnaces — here's how to diagnose and fix it.
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Lincoln Electric Welder Error Code E10 — Thermal Overload Fix
Lincoln Electric welder error code E10 means thermal overload protection has activated. This guide covers how to clear E10 and prevent it from recurring on Lincoln wire-feed and stick welders.
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Lochinvar Boiler Error Code E02 — Ignition Failure Fix
Lochinvar boiler error code E02 means ignition failure lockout on Knight, Crest, and SYNC series boilers — here's how to diagnose and fix it.
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Manitowoc Ice Machine Error Code 4 — Water Curtain Fault Fix
Manitowoc ice machine error code 4 means a water curtain or harvest fault on Indigo series machines — here's how to diagnose and fix it.
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Mazak CNC Alarm 30 — Servo Alarm Fix
Mazak CNC alarm 30 means a servo amplifier fault on Quick Turn, Variaxis, and Integrex series machines — here's how to diagnose and fix it.
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Navien Error Code E003 — Ignition Failure Fix
Navien error code E003 means ignition failure on NPE, NPN, and NCB series tankless water heaters and combi boilers — here's how to diagnose and fix it.
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Okuma CNC Alarm 1013 — Servo Axis Fault Fix
Okuma CNC alarm 1013 means servo amplifier thermal overload on OSP-P300 and P200 series controllers — here's how to diagnose and fix it.
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Rheem Furnace 5 Flashes Error Code — Flame Sensor Fault Fix
Rheem furnace 5 flashes error code means a flame sensor fault — here's how to diagnose and fix it on Rheem, Ruud, and WeatherKing furnaces.
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Siemens SINUMERIK Alarm 25000 — Drive Fault Fix
Siemens SINUMERIK alarm 25000 series means an axis drive fault on 828D and 840D controllers — here's how to diagnose and fix it.
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Yaskawa VFD Fault OC — Overcurrent Fix
Yaskawa VFD fault OC means overcurrent on J1000, V1000, and A1000 series drives — here's how to diagnose and fix it.
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York Furnace 6 Flashes Error Code — Pressure Switch Fault Fix
York furnace 6 flashes error code indicates an inducer pressure switch fault — here's how to diagnose and fix it on York, Coleman, and Luxaire furnaces.