Skip to content

Language
- English
- French
- Spanish

Carrier Enterprise Technical Services & Support

Carrier, Bryant Technical training and support

Home

Language
- English
- French
- Spanish

What are you troubleshooting?

Search by fault code, component, or symptom.

Search technical resources

PH 90

37MUHA Fault Code PH 90 – High Evaporator Temperature Protection

37MUHA Fault Codes / By Carrier Enterprise

Evaporator coil temperature is above the heating-mode protection threshold.

37MUHA Fault Code PH 90 – High Evaporator Temperature Protection Read More »

37MGRA PH 90 (High temperature protection of evaporator diagnosis and solution)

37MGRA Diagnostic Codes / By Carrier Enterprise

Troubleshooting workflow for PH 90.

37MGRA PH 90 (High temperature protection of evaporator diagnosis and solution) Read More »

Copyright © 2026 Carrier Enterprise Technical Services & Support

Login

Scroll to Top