Experiencing some climate control issues. Specifically, sometimes when the system is set to auto, the system will switch to manual and the fan will be set to low (2 green lights). Been seeing this issue sporadically for the last month.
Now, the heater wasn't blowing any hot air through the vents. If it is on auto and I move the temps to maximum hot, nothing happens, the fans don't kick in. If I switch to manual and max heat, the heat eventually comes, but if I back the temps down, the heat drops dramatically.
I just had the thermostat replaced last week, as it was leaking from the gasket. My independent shop only uses OEM Volvo parts. The car warms up fine and the temp gauge has been steady since he replaced the assembly. I also replaced the Blower Resistor about 18 months ago. I didn't use an OEM part for this.
What should I be looking for to fix this problem?