p2
Easy Fix
Mitsubishi Electric · Mini-Splits & Ductless Systems
Pipe Temperature Sensor (Condenser) Fault
Quick Answer
Error code P2 on your Mitsubishi Electric Mini-Splits & Ductless Systems means: Pipe Temperature Sensor (Condenser) Fault. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Locate the pipe thermistor on the indoor heat exchanger piping
2
Verify the sensor is firmly attached to the pipe with proper thermal contact and insulation
3
Measure the thermistor resistance and compare to the Mitsubishi temperature-resistance chart
4
Check the connector at the indoor PCB for secure contact
5
Replace the thermistor if readings are out of specification
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Pipe temperature thermistor
Thermal insulation tape
Sensor mounting clip
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