There is a good chance that the heater core has rusted out. This is a little radiator inside the passenger compartment for transferring heat from the engine coolant to the air in the cabin. Always fun to replace.
Underneath the passengers seat Actually its on the passenger side but on the front of the floor board. Just peel back the carpet on the front passenger side and you will see it
it should be right below the steering wheel
A 1991 Acura Integra is classified as OBD1 (On-Board Diagnostics version 1). This system was introduced in 1991 and continued until 1995 for most Honda and Acura models. OBD0 was used in earlier models, primarily from the late 1980s to 1990.
Heater core leaking?
The heater is leaking coolant.
Water is leaking on passenger side floor board when heat is on
Heater core has failed.
Under the fllor board passenger side eith by the ECU or behind the kick panel.
The ac drain is plugged. The drain hose is on the firewall on the lower passenger side. ...that, or your heater core is leaking.
i had a 1990 acura legend my blower motor was located under the passenger side dash board
You heater core has most likely kicked the bucket. It is anti-freeze leaking in your car. You should get that fixed ASAP (obviously!).
The HVAC blower motor for a 2003 Acura 3.2 CL Type S can be found under the right side of the dash board. It is directly to the left of the passenger side kick panel.