Outdoor Heat Exchanger Thermistor 5 Failure (Tho-R5)

Was bedeutet E37-5 ?

The fifth outdoor heat exchanger thermistor (Tho-R5) is defective. This prevents accurate temperature measurement of a specific section of the outdoor coil, impacting system control and protection.

• Outdoor heat exchanger thermistor 5 (Tho-R5) has failed.
• Wiring to Tho-R5 is broken or shorted.
• Tho-R5 reading is out of specified limits.
• Defective Tho-R5 thermistor.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Measure the resistance of thermistor Tho-R5 at its leads — compare to a resistance-temperature chart if available.

2. 2

   Inspect the connector for Tho-R5 on the outdoor unit PCB — verify it is securely seated and free from corrosion.