Tuesday, February 02, 2010 - 04:22 pm, by: Matt Petersen(Mattmannz)
AC seems to blow cold first thing in the morning and then hot only after that.
I have checked and the AC compressor is spinning, pushing the AC button on and off activates the compressor and it stays running whilst it's on, so my assumption there is that there is enough gas and pressure otherwise the compressor wouldn't come on.
I checked the heater valve and it is moving in and out when I go from hot to cold, my initial thoughts were that perhaps it's not moving away from hot but it appears to be.
The heater on full hot is very hot but the cold air is warmer than outside air, it's cooler to wind down the windows than have the AC running.
Car is a UZZ30, is there a diag function to check all the sensors that would affect heat output?