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Rheem Heat Pump Error Codes

Updated · by Aurora Star Tech Inc.

37 Rheem Heat Pump error codes and diagnostic codes, with causes and troubleshooting steps for each. Select a code, or find your model below.

Homeowner with a heat pump problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Rheem Heat Pump error codes list

CodeMeaningSeverity
01Long run time (compressor)Medium
1 flash (L terminal)L-terminal fault output: Long run cycle or low pressureMedium
02High side fault (compressor limit opened 4 times)High
2 flashes (L terminal)L-terminal fault output: High pressure control tripHigh
03Short cyclingMedium
3 flashes (L terminal)L-terminal fault output: Unit short cyclingMedium
4 flashes (L terminal)L-terminal fault output: Locked rotorHigh
05Open circuit - compressor will not runHigh
5 flashes (L terminal)L-terminal fault output: Compressor will not run, open circuitHigh
06Compressor open start circuitHigh
6 flashes (L terminal)L-terminal fault output: Open start circuitHigh
07Compressor open run circuitHigh
7 flashes (L terminal)L-terminal fault output: Open run circuitHigh
8 flashes (L terminal)L-terminal fault output: Control mis-operationHigh
09Low secondary (control) voltageMedium
9 flashes (L terminal)L-terminal fault output: Low control voltageMedium
21Low pressure control (LPC) openMedium
27Low line voltage or no line voltageMedium
28High line voltageMedium
29High pressure control (HPC) openHigh
30ICC fuse openMedium
80Low airflowMedium
83Condenser coil temperature sensor faultMedium
84Outdoor ambient temperature sensor faultLow
90Communication faultMedium
93Internal control faultHigh
d1No shared dataMedium
d3Airflow CFM mismatchMedium
d4Memory card invalid for deviceMedium
d8Old shared dataLow
Flashing c / C / h / HAnti-short-cycle (3 min) or minimum-run (30 s) timer activeLow
L4Locked rotor lockoutHigh
L6Open start circuit lockoutHigh
L7Open run circuit lockoutHigh
L21Low pressure control lockoutHigh
L29High pressure control lockoutHigh
PCompressor protector tripHigh

Find codes by Rheem model

RPRL-024JECRPRL-036JECRPRL-048JECRPRL-060JEC

Heat Pump troubleshooting guides

Rheem Heat Pump specs and setup data

Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

© 2026 Aurora Star Tech Inc. All rights reserved. This page may not be copied, republished or used to train other systems without written permission.

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