[updated 1/24/2018: Legal disclaimer added] In this Tech Tips video, Jeff explains the possible causes of P4 and P5 error codes and how to resolve them.
Very helpful. Had a p5 code flash on the tstat. Sure enough the drain line was clogged up good. Everything is working great again. Thanks for the help👍🏽
Sir I have a problem when the inverter carrier split type turns on , then the outdoor unit fan motor on, ,after 30 sec. The outdoor unit off , the comp. Not react , then error is P4