Assuming your temperature selector is not on "cold", the heater core is likely bad
The spark plugs on a 1999 Mercury Cougar are located under the cover of the engine. The spark plugs should be changed approximately every 60,000 miles or so.
top row in fuse box under drivers side black fuse
thats because your blower went out
Orange Snowflake Beware of Frost on road Next one is a Red Snowflake Beware of Ice on the Road
The mixing door isn't working. Take it to the garage as it porbably is the controler. First make sure there is vacuum getting inside the cab from the engine.
On a 1999 Mercury Cougar : The ELECTRIC fuel pump is INSIDE the fuel tank It is installed through an access hole in the top of the fuel tank
The vacuum line that goes to the defroster is probably disconnected, possibly on the fire wall.
On a 1999 Mercury Mountaineer : The ELECTRIC fuel pump is INSIDE the fuel tank . It is installed through an access hole on the top of the fuel tank
To your left at the top
Plugged evaporator drain?
It is part of the rear window defroster grid.
a/c kicks on