Mechanics

HEATING CONTROL

1994 Oldsmobile 98

Heater problem
1994 Oldsmobile 98 V8 Automatic

The heating control is not working aftering changing the unit. What else could be the problem there is no leaking or steam that would indicate it is the heating coil. Can any one tell me what could be the issue.
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Crlewis77
October 22, 2010.



What is it that's not working? Is it the blower speed or the temp of the air coming out?

Wrenchtech
Oct 22, 2010.
The temperature it is coming out cool and not hot. Thanks so much

Tiny
Crlewis77
Oct 22, 2010.
With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch.
If you find that they are both too hot to hold, then the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.

Wrenchtech
Oct 22, 2010.