Try the repair tips on the Autozone web site.
on my 1985 Lincoln town car i had to remove the dash and get back to the firewall and remove a panel on the firewall to get to it. good luck it is a pain.
How to replace heater core in a 97 Lincoln Town Car
how do u re-place a heater core for a 1984 Lincoln town car
heater coil on a linclon town car 2002
I don't know, because I'm trying to figure out the same thing...
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How do I change headlamp on 2006 Lincoln Town Car
You might need a new thermostat or heater core.
On a 1985 Lincoln Town Car : Follow the top radiator hose from the radiator to the engine . Where the hose connects to the engine the engine cooling thermostat is inside the housing
I think it's in the fuel tank because it is on a 1990 Lincoln town car
Tie the 2 water lines that run to heater core together
The 1985 Lincoln Town Car fuel pump reset switch can be found in the fuse box. The reset switch will be at the bottom of the third column.