Help no heat

[Jcdonjuan04]

dose anyone here know where the heater control valve is located in a 98 Trans am, or what it looks like? I have been trying to fix my heater because it will not blow hot air, itblows cold ALL the time. I have replaced the thermostat in my car thinking that it was the cause of my heater problem but it was not the culprit so my next step it to find that HCV but I cant find. If anyone could help me it would be great cause I going to be a COLD WEEK for me if I cant fix it.

Thanks

[joecar]

There is no HCV...

There is a cold/hot air door that is vacuum operated... maybe the vacuum hose is leaking.

[LS1_Sean]

Originally Posted by joecar

There is no HCV...

There is a cold/hot air door that is vacuum operated... maybe the vacuum hose is leaking.

the cold/hot door on my 99 was cable. only the bi-level doors were vac operated.


if i remember right. there is a cable that goes from the temp nob to the cold/hot door. you should be able to get to it if you remove the kick pannel under the glove box its close to the blower motor.

[joecar]

I stand corrected, the hot/cold door is cable operated, the bi-level doors are vacuum operated.

(I should have remembered this as I have dealt with it several times before...:doh:

[y2kbird]

Sorry for no pics, they just wouldn't load........ this is from alldata... You should be able to follow the cable from the back of the control knob to the other end where it controls the door.

1998 Pontiac Firebird V8-5.7L VIN G
Vehicle Level Heating and Air Conditioning Air Door Air Door Cable Service and Repair


Service and Repair
Notes

Remove or Disconnect



Right instrument panel insulator.
Temperature control cable at A/C module (1).
Remove temperature control cable bolt.
Accessory trim plate.
Pull control cable trim plate rearward and off instrument panel lower trim pad.
HVAC control bolts.
HVAC control.
Pull control out far enough to reach temperature control cable connection.
Temperature control cable.
While releasing temperature control cable clips from control, pry temperature control cable with small screwdriver from control.
Install or Connect



Temperature control cable to control.
Slip temperature control cable into position over lever arm. Align shaft with temperature control cable slot.
Press temperature control cable clip into slot in control. Make sure all three clips are in place.
HVAC control.
HVAC control bolts. Tighten
HVAC control bolts to 1.9 N.m (17 lb. in.) .
Accessory trim plate.
Hold accessory trim plate in position and press it forward to engage four retaining clips.
Temperature control cable at heater module with temperature control cable bolt. Tighten
Temperature control cable bolt to 1.9 N.m (17 lb. in.) .
Right instrument panel insulator.

[Jcdonjuan04]

Thanks guys i got fixed great help