Rheem P16 Series Installation Instructions Manual page 40

TROUBLESHOOTING
DEFROST MECHANICAL CHECKS FLOW CHART
Reversing Valve Stuck
No Defrost Timer
Control Power
Failed Defrost Control
Failed Defrost Relay
Loose Defrost
40
DEFROST SYSTEM
No Defrost Incomplete Defrost
Poor Sensor Location
Wrong Defrost Control
Failed Defrost Relay
(doesnʼt stop O.D. Fan)
Thermostat Satisfies
Sensor
Excessive Defrost
Wrong Defrost Control
Timer Setting Poor Sensor Location
Low System Charge
During Defrost
Timer Setting
Wind Affecting
in Defrost