If you are not leaking antifreeze on the floorboard, then it sounds like someone bypassed the heate core. Look under the hood for some hoses that run through the firewall. They may be cut.
1997 ford moterhome E350 with a V10 Triton engine My AC will not switch over to heat
On a 1997 Ford Thunderbird : The odometer is in the middle of the speedometer
The temperature control module for a 1997 Ford explorer is the unit that controls all of the heat and ac functions. If it is not operating properly, then the heat ac and defrost will work improperly or not at all.
The 1997 Thunderbird 4.6L engine has only 1 catalytic converter.
According to the 1997 Ford Thunderbird Owner Guide : ( 18.0 U.S. gallons / 68.1 litres )
If it is a 5.0 from a 1991-93 Thunderbird/Cougar, then yes
1997 Ford Thunderbird 4.6L SFI 8cylThe Spark Plug Gap.054 (In thousandths of an inch)
In a 1997 Ford Thunderbird the 3.8 liter V6 engine has a timing CHAIN
On a 1997 Ford Thunderbird ( V6 and V8 ) 68.1 liters ( 18.0 U.S. gallons )
On The AC Case Inside The Dash
The 1997 Ford Thunderbird 4.6L engine was reported to have 205 HP.
on the top of the steering colomn