I have a 2000 XJ 4.0 I6 w/310k and the heater core has just been replaced.
my issue is the A/C works but when I change it to max A/C she blows hot, without max on she blows about 40°.
has anyone had this issue or know what the problem could be? like I said A/C works but not on max A/C, fan blows just hot or worm not 40°.

thanks in advance for the help.

 

My guess is something wrong with the selector switch. Otherwise, all MAX does is switch to recirculated air.

 

Thanks IJM,

yeah but it was just wired that the regular fan speed blow cold but the max/recirc speed blow hot.

now everything is hot like 60° to 65° taking her in to the mechanic ASAP, Thanks again