The heater was blowing cold air in my 99 blazer, so i took it to the shop where they replaced the water pump (which was leaking) and flushedthe heater coil. The heat works greatbut nowi cant turn it off. The A/C wont evenwork.The onlyother thing I've noticed is a rattle coming from the A/C clutch when it turns on. Any ideas? Thanks.

 

I would take it back and have them check what they unplugged or messed up under warranty. There are several sensors for the A/Cthey might have damaged/unplugged/messedup while working under the hood.

 

Thanks, has anyone noticed a common HVAC problem when changing the water pump?The mechanic who did the work doesnt know what could have happened and wants me to take it to the dealership for diag.

 

Why goto the dealership if they did the work? That only makes it where you have to pay again. Guess they know they would have to do it under warranty and don't want to loose that time where they could bemaking $over no charge. Any good shop would check their work for no cost after a repair due to they know they are held responcible for any extra damage their mechanics might have done. And sometimes its really easy to knock something loose and not see it (looks innocent)

But yea, I would for sure make them do the diag. over going to the dealership. That way you don't have to pay again for work that you should not have too.

Or I would have them pay the dealership to check what they did wrong