Hello Folks...1st time user...Jeep 2000 Grand Cherokee...blows out air but no heat when on HI...had a relay switch changed recently due to overheating...any ideas what problem might be??...Thanks:confused:

OK...got an update...passenger side is OK...warm air comes out fine...driver side blows out cold air only...is it is baffle problem or a switch problem??...any help would be greatly appreciated...thanks

Limited or Laredo? If it's a Limited with the Auto AZC system it sounds like the blend door issue, more info here:
http://www.wjjeeps.com/hvac_sub_assembly.htm

excellent site!!!...thanks for the update...autoforum folks come thru again...:smile: