Assume you mean, temp wise.. not the blower speed.
Would be the 'blend' door in heater housing is broken or stuck.
There are two doors, diverter (DEF-floor-vent, etc) and blend which sets
get under dash and see which is not working tho door may be loose inside
You need find someone who is used to actually working on cars, not just
changing oil on them.
Quik temp fix:
uncouple heater hoses at firewall into cabin and connect together with
short piece of tubing (or barb connecter) and clamps.
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
Fan stuck on? Pull the power connector off the fan motor, make sure
there isn't a latch on the connector you have to push/pull/trip first.
Pulling the heater fuse might do it - but they usually put multiple
systems on one fuse, and the other things that get turned off might be
important to you.
Heat stuck on? The quick fix would be to manually close the heater
valve. Mechanical heater valves are simple, loosen the screw securing
the cable sheath, slip the actuating wire off the valve crank arm, and
move the crank arm to the closed position.
Vacuum actuated heater valve - pull and plug the vacuum hose, if the
valve doesn't close by itself under spring pressure you may have to
pull the little linkage shut. And the spring failure in the actuator
would explain why the heat stayed on even with the control off.
'Backyard Mechanic' implies that there is no heater valve on the
coolant line of that model, and they depend on closing the air damper.
That would be stupid design, but I wouldn't put it past them... In
that case he's right, you'll have to rig a bypass or place a manual
heater valve in line to turn of the hot coolant input to the heater
--<< Bruce >>--
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