For the past several years my 89 Town Car has had a coolant leak. Since the
leak was slow I have been simply topping off when needed. I finally decided
to address the issue and make the repairs. I have replaced all hoses, the
water pump, and the thermostat. Leak problem solved. However, it seems that
I now have no heat at all. Since I have not run the heater since last
winter, I don't know when the problem started.
If I allow the engine to reach operating temperature both supply and return
hoses to the heater core are hot. There is a sloshing sound in the passenger
compartment when I accelerate, but there is no sign of leaking coolant from
the heater core. The car does have climate control, and I have seen posts
referencing temperature sensors and blend doors. I am not quite sure where
to start first. Any suggestions?