heater problem 1991 jimmy - cold air only

09-18-2004, 05:07 PM
Have new heater core and thermostat yet still blows only cold air. Anyone else have this problem? Winters on it's way and I need to get this fixed. Any thoughts would be appreciated.

09-18-2004, 08:54 PM
1. Hot coolant circulating through it (not airlocked)?
2. Hot/cold selector cable attached to the lever/vent flap ?

09-25-2004, 12:10 PM
the selector cable seems to be connected because the air does change.....it decreases in volume when set to heat though.
how would i check for an airlocked coolant hose? I imagine it should feel warm on the hose, on the engine side of the firewall.

all new to me.

09-25-2004, 12:11 PM
and thanks Teaman3

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