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.
check fuse.
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
In a 1993 Plymouth Acclaim, the heater blower motor resistor is typically located under the dashboard on the passenger side of the vehicle. It is mounted near the blower motor, often accessed by removing the lower dash panel. You may need to disconnect the wiring harness and remove screws to access the resistor for replacement or inspection.
Discard the valve all together and plug the vacuum line as if there was no bypass valve
If the air conditioner in a Mitsubishi Legnum is not working, there could be a blown fuse. There could also be a loose cable, or a problem with the heater motor.
Seldom is a heater core repairable. Replace the heater core with a new one.
Not much info to go with. Need to know if the blower motor operates or not.