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Discard the valve all together and plug the vacuum line as if there was no bypass valve
you have to remove the dash
The heater core is inside the Hvac housing, under the dash.
Usually behind the glove box area
Heater blower motor running continuously. Check the heater resistor pack.
From where I can get the block heater cord for 94 Acclaim?
This process could take up to 3 hours. The Heater core is best flushed if you are having problems with flow. Is this an option? F. Garay
take one end of your heater hose off the heater core and run it back to the intake port.
Low coolant? Bad thermostat? Heater core plugged, restricted, or airbound? ============================================================== Good answers by original poster. I would recommend replacing the t-stat first. Its pretty straightforward. If that doesnt solve your problem, our 89 acclaim's have a heater valve (it shuts off coolant flow to the heater core when the a/c is activated to increase the efficiency of the a/c) by the firewall that can stick or lose vacuum (broken vacuum line). Check that next. Lastly, I would take the lines off the heater core and run a garden hose up to it. This will "backflush" any accumulated crud out of the heater core. I do this to my Acclaim every fall and cant believe the crap that comes out! ============================================================== When the heater went out in my car, I went in and found out that it was the heater control valve. Check it out.
Heater coolant bypass pipe It would be the return hose for the heater.
No , if you were to bypass the heater core , you would have no heat
Seldom is a heater core repairable. Replace the heater core with a new one.