underneathe the van by the oil filter.
where is the heater core in a 1992 Toyota previa
Follow the link below to the Previa user group.http://autos.groups.yahoo.com/group/previa/message/32333
It is at the dash board bottom just at the middle. You can see a plastic rectangle were the heater core is and at the right side are the pipes that goes to the coolant valve at the engine
Most common things are Thermostat or a bad heater core but could also be something blocking the door down by the heater core. I changed my Thermostat and Heater control Valve to find out a pencil fell in the defroster and prevented the door from closing. Hope this helps.
The heater control valve on a Toyota Previa is typically located near the firewall, on the passenger side of the vehicle. It is connected to the heater hoses that run from the engine to the heater core. To access it, you may need to remove some components or covers, depending on the specific model year. Always consult the vehicle's service manual for precise location and replacement instructions.
Heater core could be clogged.
Have you flushed the heater core?
Low coolant? Thermostat not opening? Control cable not working? Plugged heater core? Heater core "airbound"? Low coolant? Thermostat not opening? Control cable not working? Plugged heater core? Heater core "airbound"?
The temperature of the coolant entering the heater core is controlled by the engine thermostat. The engine coolant thermostat is generally located at the engine end of the upper radiator hose.
no heat can be caused by,blocked heater core insufficient coolant in engine blocked heater hoses from engine to heater core bad heater thermostat bad thermostat in engine bad heater control switch
If you need a heater core, the one you currently have would be leaking. If the car is over heating or not getting warm enough, think thermostat.
Check the thermostat or heater core