Outdoor Heat Exchanger Thermistor 2 Failure (Tho-R2)

Hva betyr E37-2 ?

The second outdoor heat exchanger thermistor (Tho-R2) is defective. This prevents accurate temperature measurement of a specific section of the outdoor coil, impacting system control and protection.

• Outdoor heat exchanger thermistor 2 (Tho-R2) has failed.
• Wiring to Tho-R2 is broken or shorted.
• Tho-R2 reading is out of specified limits.
• Defective Tho-R2 thermistor.

Klikk på steg for å spore fremgangen.

1. 1

   Measure the resistance of thermistor Tho-R2 at its leads — compare to a resistance-temperature chart if available.

2. 2

   Inspect the connector for Tho-R2 on the outdoor unit PCB — verify it is securely seated and free from corrosion.