my a/c only runs on high

if your fan is not going on it can be the relay, or a broken temp sensor. the AC only running on HIGH that can be a problem with the switch unit. all is very easy to replace. any moron from AUTOZONE can tell you how to do it.

Sounds to me that if 1-4 dont work, but your blower motor only works on five than its your blower motor resistor. When replacing the resistor which is typically in the HVAC case on the passenger side, inspect the connector for damage because when the resistor goes it likes to take out the connector also.

When I start my 2016 jeep cherokee, the passenger climate control setting automatically jumps to high when on the celcius setting. If I swith the setting to F, it does not happen. The dealer replaced the control head...but it didn't fix the problem. Any one out there having similar problems?

found a new fan resister for my 1994 jeep grand Cherokee on amazon for 24$ napa and advanced both wanted over 170$ I had to pull the bad one out and use the numbers on the part to find the correct one. This was a quick fix. just remember to disconnect negative on the battery and use your key to unlock and lock your doors and hatch to reset security.