Mitsubishi Air Conditioner Error UH
⚡ Quick Answer: The Mitsubishi Air Conditioner error code UH indicates a communication failure between the indoor and outdoor units, often due to a current sensor abn... ✅ DIY Fixable
What Does Error UH Mean?
The Mitsubishi Air Conditioner error code UH indicates a communication failure between the indoor and outdoor units, often due to a current sensor abnormality. This issue may cause the unit to stop operating shortly after starting, leading to a loss of cooling or heating function. Signs include a blinking display and potential electrical irregularities during startup. Resolving this may require inspecting the current sensor circuitry and associated connections.
Common Symptoms:
- Unit displays 'UH' and stops operation shortly after starting.
- Potential loss of cooling/heating function due to safety shutdown.
- May be accompanied by power irregularities at startup or under load.
Possible Causes
- Current sensor abnormality in the outdoor unit (medium)
- Abnormal voltage conditions affecting sensor readings (low)
- Connector or wiring issue related to current sensor circuit (low)
How to Fix Error UH
DIY Fix Perform basic power reset and check power supply
- Turn off the air conditioner and disconnect power at the breaker.
- Wait 30 seconds and restore power to reset internal protections.
- Ensure the AC is connected to stable mains power without significant voltage fluctuation.
- Attempt to restart the unit to see if the error persists.
Technician Only Inspect current sensor circuitry and associated wiring
- Use official service tools to read detailed fault logs if available.
- Inspect current sensor and its connectors for signs of damage or poor connection.
- Test voltage supply consistency and look for irregular voltage that may affect sensor readings.
- Replace faulty sensor or repair wiring as indicated by diagnostic results.
Parts needed: Current sensor assembly, Wiring harness or connectors
- If the UH error reoccurs after a power reset
- If there are signs of electrical damage, burning smell, or unusual noises
- If the unit does not operate normally after basic user-level steps
Next step
Choose the next step for UH
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
- Typical part-only price
- $20 - $120
- DIY difficulty
- Medium
- Estimated time
- 30-90 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Model-compatible Air Conditioner parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Air Conditioner Fin Cleaner
For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.
Model-Compatible Washable AC Filter
A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.
Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
Common Questions
What does UH error mean on Mitsubishi Air Conditioner?
The UH error indicates a communication failure between units due to a current sensor issue, often resulting in the unit stopping shortly after starting.
Can I fix Mitsubishi Air Conditioner UH error myself?
Yes, you can perform a basic power reset and check the power supply to see if it resolves the issue.
How much does it cost to fix UH error?
The estimated repair cost for the UH error ranges from ¥15,000 to ¥50,000, depending on the model and region.
When should I call a technician for UH?
Call a technician if the UH error reoccurs after a power reset, or if you notice electrical damage, unusual smells, or noises.
Sources & References
Data last verified: 2026-07-31
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