The heater core is still having hot fluid running through it. Check to insure that the shut off is stopping the flow through the heater core.
On a 1998 Ford Ranger : The evaporator core for the air conditioning system is inside the plastic case ( that also holds the heater core ) located behind and below the glove compartment in the dash on the passenger side
The air conditioning condensor
HEATER WISE? YOUR HEATER CORE MAY BE BLOCKED
The 1993 Ford Ranger air conditioning charge valve can be found on the top of the air conditioning compressor. The charge valve will be marked as the low pressure valve.
Actually , the heater core doesn't have a drain
A 1985 Ford Ranger ( all engine sizes ) came WITH and WITHOUT air conditioning
The price for a Ford Ranger block heater varies slightly by year of the vehicle and the retailer. As of 2014 the average price for this part is between 24.99 to 29.99.
The block heater on a 1995 Ford Ranger is in the engine space under the hood. The plug for the heater block is located near the front of the engine.
were is the vocuum hose at on a 91 ford ranger at on 91 ford ranger xlt 4x4 4.0
I had this problem before on a ranger you have to pull the dash board out and it will be right there.
The 1999 Ford Ranger low pressure air conditioning valve can be found on the air conditioning compressor. The low pressure valve will be labeled as the low pressure port.
heater resister is bad