Mitsubishi Heat Pump Error Code P2: How to Fix It

Q: What does Mitsubishi heat pump error code P2 mean?

Error code P2 indicates a fault with the indoor coil temperature sensor (TH2 thermistor). This sensor monitors the evaporator coil temperature to ensure proper heating and cooling operation.

Q: Can I continue using my heat pump with P2 error code?

You should not continue operating the heat pump with error code P2. The faulty sensor can cause improper temperature control, reduced efficiency, and potential damage to other components.

Q: How much does it cost to replace a TH2 thermistor sensor?

A replacement TH2 thermistor typically costs $15-40 for the part. Professional repair costs range from $150-300 including labor, depending on your location and the complexity of access.

Q: How long do heat pump thermistors typically last?

Heat pump thermistors generally last 8-15 years under normal operating conditions. Factors like humidity, electrical surges, and system age can affect their lifespan.

Q: What causes a heat pump coil sensor to fail?

Common causes include normal wear over time, electrical surges, moisture exposure, physical damage during maintenance, or manufacturing defects in the sensor component.

Abstract

Mitsubishi heat pump error code P2 indicates a faulty indoor coil sensor (TH2 thermistor). This sensor monitors the temperature of your indoor evaporator coil to ensure proper heating and cooling operation. When it fails, your heat pump can't accurately control temperature, leading to reduced efficiency or complete shutdown.