All Carrier error codes
Carrier heat pumps don’t use the codes that are often found online for this brand. Here’s how to read what your unit displays, and how to get its exact meaning.
Your Carrier code isn’t in the list?
Describe your issue to Cody. He identifies the code, tells you what’s happening, and what you can check yourself. If he doesn’t know the code, he looks it up in the manufacturer’s documentation.
How to read your Carrier heat pump codes
Carrier 42QHC / 38QHC reversible air conditioners (mini-splits) display alphanumeric codes: E0, E1, E3, E4, E5, EC, F1 to F5, P0, P1, P2, or P4 (P2, for example, corresponds to overheating at the top of the compressor). They don’t use two-digit numeric codes.
Write down the exact code or message displayed, then give it to Cody : he’ll explain what it means for your model and what you can check.
Source: Carrier 42QHC manual
Technical information provided for reference only, based on manufacturer documentation and field feedback. It does not replace a diagnosis by a qualified professional. Found an error on this page? Report it.