Hello,
My civic is constantly overheating only when AC is on. I replaced thermostat, water pump and ECT temp sensor. I also did radiator pressure test and it was fine. Ive been told I have a head gasket, but no signs at all and it runs perfectly fine. Any advice?
Check your cooling fans.
Cooling Fans run fine though.
When you turn on the AC, do they come on?
How about the cooling level?