nintythreez28

My heater will not blow warm. It blows cold at all times. i can give several details but thats about it. When I go from hot to cold on the **** it blows harder on cold. Defrost is always cold... That's about it. Any suggestions? How do you bleed system properly? Could a hose be clogged? It's fetting cold fast here in missouri please help!

RamAir95TA

iTrader: (2)

http://shbox.com/1/4th_gen_tech2.html#heaterflush

djjab57

iTrader: (17)

Heater core could be cloged or it could be the door that moves over for warm air. When you turn the **** do you hear the door switch over ?

nintythreez28

I don't hear it but I can feel it. Turning the **** to warm is harder than turning to cold and it blows harder when its set on cold

djjab57

iTrader: (17)

You can un hook the heater lines going to the fire wall (passenger side) put a water hose to it and see if the water flow freely

nintythreez28

There are 2 of them should I do it to both?

djjab57

iTrader: (17)

Just un hook them both and run water threw one side

nintythreez28

Ok ill give this a shot in the next couple of days and get back to ya. Thanks for the quick reply!

FAD2BLK93

Every time i turn hot and cold it seems to be cable driven to the blend door, u can go under the dash and find the warm spot on the plastic underside and open the blend door manually, and then prop it open.

nintythreez28

not gonna lie im actually kinda scared to rip apart my dash. its kinda brittle feeling and teh dash is already cracked. i guess ill have to if nothing eils works. do you know about where this "door" is?

djjab57

iTrader: (17)

I'm not 100% sure but it may turn by vacuum I'm sure someone else will chime in. It happen to me many years ago on my first 94 ZR28 but I had a shop fix it

djjab57

iTrader: (17)

If you listen to it you can hear it down by your feet in the center console. No taking the dash out

shbox

The temperature door is cable operated.

nintythreez28

well im going to backflush the system today. if that dosnt work i will try messing with the temp. door. So does it just get stuck or does that cable come off track?

05HD

Put a new heater core in it. It is cheap and easy and almost always the problem.

nintythreez28

Well the backflush went well. My car literally had diheria. But the heat works now. Only thing i can say is be careful of the opti. Mine got a little wet. Ran kinda funky for a minute and died once. It dried up now its running strong with heat. Thanks for the help!