Tag: fujitsu

All the articles with the tag "fujitsu".

• Fujitsu ASU9RLF Ductless Mini Split Problems & Error Codes

  8 Jun, 2026

  Communication errors between indoor and outdoor units are most common, usually fixed by reseating connectors or replacing the interconnect harness.

• Fujitsu Mini Split Ice on Coils - Causes & Fix

  1 Jun, 2026

  Ice on indoor coils is usually caused by a dirty air filter or clogged evaporator blocking airflow. Clean or replace the filter first.

• Fujitsu Mini Split Blowing Warm Air - Causes & Fix

  1 Jun, 2026

  Usually a dirty air filter or wrong mode setting. Check the filter, verify the system is in Cool (not Heat or Fan), and inspect outdoor-unit operation.

• Fujitsu Mini Split Leaking Water - Causes & Fix

  1 Jun, 2026

  A clogged condensate drain line is the most common cause. Clear the drain with a shop vac and flush with water to restore flow.

• Fujitsu Mini Split Not Heating - Causes & Fix

  1 Jun, 2026

  Most often a dirty filter, thermistor failure, or 4-way valve problem. Check filters first, then sensor voltage and reversing valve.

• Fujitsu Mini Split Not Cooling - Causes & Fix

  1 Jun, 2026

  Dirty air filters blocking airflow are the most common cause. Clean or replace filters, then check for error codes on the indoor LED.

• Fujitsu ASU12RLF1 Problems & Error Codes

  1 Jun, 2026

  Communication errors from loose indoor-outdoor wiring are most common. Check terminal blocks, reseat connectors, and power cycle the system.

• Fujitsu Mini Split 11:4 Error Code — Indoor Unit Communication Timeout Fix

  21 May, 2026

  Fujitsu 11:4 means the outdoor PCB stopped receiving valid communication frames from the indoor unit within the firmware timeout. It's almost always wiring...

• Fujitsu Mini Split 14:1 Error Code — High Pressure Fix

  21 May, 2026

  Fujitsu 14:1 means the outdoor high-pressure switch opened — head pressure climbed past the trip point (around 580-620 PSI on R-410A platforms) and the...

• Fujitsu Mini Split 15:1 Error Code — Low Pressure Fix

  21 May, 2026

  Fujitsu 15:1 means the suction-side low-pressure switch opened — suction pressure dropped below the trip threshold (around 25-30 PSI on R-410A platforms)...

• Fujitsu Mini-Split Error Code E9 — Refrigerant Circuit Fault

  22 Apr, 2026

  Fujitsu mini-split Error Code E9 means a refrigerant circuit abnormality or electronic expansion valve fault. Learn causes, diagnosis, and how to fix Fujitsu E9.

• Fujitsu Mini Split Error Codes — E and P Code Guide

  22 Apr, 2026

  Fujitsu mini split error codes: all E and P fault codes for Fujitsu Halcyon and Airstage systems with causes and fixes.

• Fujitsu Mini-Split E7 Error Code — Causes & Fix

  22 Apr, 2026

  What Fujitsu mini-split E7 error code means, why the drain pump faults, and how to fix it step by step.

• Fujitsu Mini Split E3 Error Code — Causes & Fix

  22 Apr, 2026

  What Fujitsu mini split E3 error code means, why it happens, and how to fix it step by step.

• Fujitsu Mini Split E1 Error Code — Causes & Fix

  22 Apr, 2026

  What Fujitsu E1 means, why it happens, and how to fix it step by step.