Mitsubishi Electric City Multi aircon 5106 error code
Use this Mitsubishi Electric City Multi 5106 error code guide to capture the fault correctly and see what should be checked before parts are quoted.
What does Mitsubishi Electric 5106 mean?
Mitsubishi Electric City Multi 5106 is listed as temperature sensor TH6 fault at the HIC-circuit outlet in VRF rows such as City Multi VRF outdoor-unit diagnostics. The loaded row is source-backed by official diagnostic material. Confirm the exact model, series, or signal row before accepting a parts quote.
Open, shorted, displaced, or out-of-range thermistor or pressure-sensor reading.
Loose sensor connector, damaged sensor harness, or water-affected wiring.
PCB input fault after the sensor and wiring readings are confirmed.
What to do now
Use these steps before customer action, a sensor check, or PCB quote.
Treat it as a fault signal
If 5106 remains displayed or cooling is still abnormal, preserve the code and arrange diagnosis.
No manufacturer reset steps listed for 5106
Capture the complete 5106 display and model stickers first. The selected source row lists no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
5106 error code, a clear display photo, Mitsubishi Electric City Multi model stickers, affected rooms, operating state when the code appeared, and when the fault appears
Source-specific guidance
These diagnostic-reference notes help match the code to the exact model. Electrical, refrigerant, wiring, resistance, and component checks are technician work, not DIY steps.
| Source detail | What it says |
|---|---|
| Diagnostic note | Check TH6 resistance, lead-wire condition, connector contact, and the control-board monitor reading against actual temperature. |
| Singapore / model note | Official Mitsubishi Electric Singapore City Multi PDF page 5, primary fault-code table for the outdoor unit. Confirm the installed City Multi equipment and the unit reporting the code before parts replacement. The table also shows preliminary code 1216 in parentheses; it is diagnostic context, not a separate public fault route. |
What to check before repair
Use this split to separate safe evidence capture from the tests a technician should prove before quoting parts.
| You can check | Technician should confirm |
|---|---|
| Before taking any system action on 5106, take a clear display photo. | Confirm which sensor 5106 maps to on the exact model table. |
| Capture the Mitsubishi Electric City Multi indoor and outdoor model stickers so the correct family row is used. | Measure the sensor value against the service-manual resistance or voltage range. |
| The selected source row lists no customer reset procedure. Note whether one room, several rooms, or the whole system is affected. | Check connector condition, harness continuity, and PCB input before replacing boards. |
What changes the next step
These clues decide whether the first check is room-side, shared outdoor-side, refrigerant-side, source-table, or model-family confirmation.
| What you see | What it points to |
|---|---|
| Only one indoor unit shows 5106. | The affected room, indoor board path, wiring route, or local component should be checked first. |
| Several rooms or the outdoor unit show the same 5106 fault. | Prioritise the reporting-unit sensor circuit, shared harness path, and control-board input. |
| The fault appears immediately even before the unit cools properly. | Sensor value, connector, harness, and PCB input should be tested in that order. |
| The model family is different from the row you found online. | Use the model or series filter first; same-looking codes can still belong to different diagnostic tables. |
| The model belongs to VRF rows such as City Multi VRF outdoor-unit diagnostics. | The loaded row is source-backed by official diagnostic material. Use the matching source row before quoting parts. |
Sensor or PCB decision
Mitsubishi Electric City Multi 5106 is usually repair-first if a sensor or harness reading is confirmed. Board replacement should wait until the sensor circuit is tested.
Sensor replacement is usually targeted when resistance or voltage readings are out of range.
Harness or connector damage can look like a sensor fault until continuity is checked.
PCB replacement is a later step if the sensor and wiring test correctly.
Mitsubishi Electric 5106 questions
What does the Mitsubishi Electric 5106 error mean?
Can I fix a Mitsubishi Electric 5106 error myself?
Is it safe to keep running the aircon with a 5106 error?
What causes a Mitsubishi Electric 5106 error?
Will a Mitsubishi Electric 5106 error need a repair or a full replacement?
What should I send a technician about a Mitsubishi Electric 5106 error?
Confirm the fault
Share the error code, model number and symptoms so we can assess the likely cause.
Not the right code?
Browse the full Mitsubishi Electric list or check a few codes in the same fault category.
Ready to get started?
Tell us what’s going on. Symptoms, setup, photos, anything we should know. We’ll assess and come back with the right next step.
Read next
Use these if the quote mentions the parts, checks, or repair path this code points to.