Rear Heather - 2003 Tahoe Lt

[boomtown58]

No heat from rear heater. Front works fine! I assumed that they were off the same heater unit? Looked at fuse for rear climated control and it seemed ok. Any Ideas? Thanks, Boom

[minibike132]

No heat from rear heater. Front works fine! I assumed that they were off the same heater unit? Looked at fuse for rear climated control and it seemed ok. Any Ideas? Thanks, Boom

 

Boom, Best to split this into easy and hard. Easy first...The rear will never be hot just warm, that said there is a rear heater core just like in the front, get the vehicle to operating temp and locate the hoses to the rear core(try looking at the ones in the front and follow them under and to the rear) make sure they are hot. If they are not then there are easy things to check, If they are it's a little more difficult. Check em and get back to me. Mike

[tim73]

I know on my 03 Yukon XL, I had this saem problem. Turned out it was the rear controller. There was power going to it(Had lights) but it would not power up. Replaced it, fixed the problem.