Check your engine cooling system. Now. The heater runs off of the cooling system by using hot coolant from the motor to heat the cab. If your heater has failed it could be that you are low on coolant or your pump has failed. If either is true you can crack your block by driving the car. Now of course things probably arn't so dire. You may have a vacuum leak in the control system or a stuck air door. However, it could be a major problem that could wreck the car.
the heater hoses usually lead away from the thermostat and go into the fire wall. On the other side of the firewall is the heater core. the top hose on the radiator goes into the thermostat most of the time
134
The spring goes into the engine.
I believe that is a ( 4R70W ) automatic transmission
Should be 134, but, check with dealer first.
The stock tires for a Crown Victoria are P225-60-R15, provided you haven't changed wheels.
tight and clean the battery cables.
The cooling fan at the radiator is not coming on. Running the heater take heat out of the coolant as it goes through the heater.
there is something wrong with your switch in the door you may have to change it
Take the old one out, and go to your local auto parts.
Most likely a blown head gasket, and hopefully only that.
fuse link wire on 1983 crown Victoria that goes to fuel pump was getting hot with ignition switch off?