Posts
All the articles I've posted.
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Lennox Error Code 224 — HSI Relay Failure Fix
Lennox error code 224 — displayed on the alphanumeric LED of G24M, G50, G60, SLP98V, EL296V, and similar Lennox boards — means the control's HSI (hot...
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Lennox Error Code 270 — Flame Signal Lost Fix
Lennox error 270 — on G24M, G50, G60, SLP98V, EL296V boards — means the burners initially lit (flame established and the board confirmed it) but then the...
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LG Dishwasher Error IE — Water Inlet Fix
LG dishwasher error IE means the control board started a wash cycle and opened the water inlet valve, but didn't see the sump fill to the correct level...
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LG Refrigerator Error ER RF — Evap Fan Motor Fix
LG error code "ER rF" (sometimes shown as "Er rF" or simply "rF" on older models) means the freezer evaporator fan motor isn't sending its expected RPM...
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LG Washer Error LE — Motor Lock / Stator Fix
LG washer error LE means the main control board sent a command to spin the motor but the Hall sensor on the stator reported the rotor not turning, or...
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Lochinvar Knight E02 — High Limit / Stack Temp Fix
E02 on a Lochinvar Knight wall-hung (WHN, WBN) or Knight XL floor-mount condensing boiler indicates a high limit or stack temperature lockout. The SMART...
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Manitowoc E15 Error Code — High-Side Pressure Switch Open Fix
E15 on a Manitowoc ice machine means the high-side pressure switch opened — discharge pressure exceeded its trip setpoint, typically 450 PSIG on R-404A...
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Manitowoc vs Scotsman Ice Machines — A Commercial Tech's Honest Comparison (2026)
For an operation that needs a single high-output cuber to feed a large bin, buy Manitowoc — the production-density-per-square-foot and the multi-unit fleet...
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Master-Bilt Walk-In Error Code — Controller Fault Fix
Master-Bilt walk-in cooler and freezer controllers (Penn KE2 Evap Efficiency, Heatcraft Beacon II, and the older Master-Bilt-branded Danfoss EKC) display...
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Mazak Matrix Alarm 1041 — Battery Voltage Drop / Encoder Battery Fix
Mazak Matrix Alarm 1041 (Battery Voltage Drop) is a warning that the absolute encoder backup battery has dropped below the low-voltage threshold — about...
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Mazak Alarm 218 — Spindle Motor Overheat Fix
Mazak Alarm 218 (Spindle Motor Overheat) fires when the thermistor embedded in the spindle motor stator windings exceeds the trip threshold — typically...
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Mazak Alarm 415 — Position Detector Error Fix
Mazak Alarm 415 (Position Detector Error) means the servo drive lost a clean signal from the position encoder on one axis — either the absolute position...
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Mazak Servo Parameter Error Fix (Matrix, M-Plus, Smooth)
A Mazak servo parameter error (variously labeled "Servo Parameter Error," Alarm 1280, Alarm 13, "PARAM SET," or shown as a drive-side AL on the MDS...
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Mitsubishi P-Series H6 — Outdoor Fan Motor Fix
Code H6 on a Mitsubishi P-Series (PUZ/PUY commercial split, PUMY VRF outdoor unit, City Multi outdoor) indicates an outdoor unit fan motor fault — the...
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Mitsubishi P3 Error Code — Outdoor Coil Thermistor Fix
A Mitsubishi P3 means the outdoor unit's coil thermistor (typically TH4, sometimes labeled TH-7 or TH-DEFROST depending on platform) is reading outside the...
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Mitsubishi P7 Error Code — System Mode Mismatch Fix
A Mitsubishi P7 means one or more indoor units in a multi-zone or VRF (variable refrigerant flow) system has requested a mode (heating or cooling) that...
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Mitsubishi vs Daikin Mini-Splits — A Service Tech's Honest Comparison (2026)
If you want the highest-performance cold-climate mini-split for a Northern U.S. home (Hyper-Heat technology for sub-zero performance), buy Mitsubishi — the...
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Mori Seiki / DMG MORI Alarm 3010 — Servo Error Fix
Mori Seiki / DMG MORI Alarm 3010 (sometimes formatted as "SV-3010" or "Servo Alarm 3010" in the OPERATOR screen) is a Fanuc servo amplifier error indicating...
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Navien NPE/NCB Code E003 — Ignition Failure Fix
E003 on a Navien NPE-A, NPE-S, NCB, or NFC series condensing combi/boiler indicates an ignition failure — the control attempted ignition through its full...
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Navien NPE-A 016 — Overheat Lockout Fix
Code 016 (also displayed as E016) on a Navien NPE-A or NPE-S tankless water heater means the unit's heat exchanger outlet temperature exceeded the overheat...
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Norlake Walk-In Error Code — Defrost Issue Fix
Norlake commercial walk-in cooler and freezer controllers (typically Heatcraft Beacon II or KE2 Evap Efficiency in newer installs, Danfoss EKC in older)...
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Okuma OSP Alarm 2202 — Spindle Fix
Okuma OSP control alarm 2202 (formatted as "2202 SPINDLE" or "2202-1" with axis sub-code) indicates the spindle drive amplifier has detected a fault during...
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Payne Error Code 31 — Pressure Switch Did Not Open Fix
Payne code 31 means the integrated furnace control sees the pressure switch already closed at the start of a heat call, before the inducer has run — the...
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Pitco Fryer Error Code E6 — High Temp Limit Fix
Pitco commercial fryer error E6 means the high-limit safety switch has opened — oil temperature exceeded the safety threshold (typically 460-475°F). The...