you may have leaves in the fan
Leave it turned off.... doh
The heater core or a hose to the heater core has a leak. Hopefully it's a hose under the hood because it's a very involved process to get the heater core out.
I have a 2003 mercury grand marquis will sputter around running 35 - 60 mph ?
How to change a heater core on a 1997 Pontiac grand am
where to locate heater fuses for a 2001 grand prix gt
Where is the the heater control valve??
where is the heater core at
Low coolant? Heater core airbound, resgtricted, or plugged? Bad thermostat? Heater control cable not adjusted properly?
its located on the heater core
where is the heater control valve
To remove the heater core on a 1992 Grand Marquis, first remove the dash board. Then remove the AC box to have access to the heater core.