take the whole dash out
Probably a leaking heater matrix
The heater matrix can be accessed from the front passenger side. Remove the glove box and the flow end return pipes for the heater matrix can be seen. You will need a fairly long T20. Torx driver.
the heater matrix is blocked
how to replace a heater matrix in a toyota previa
The heater matrix can be replaced by removing the heater core and temperature control cables. Replace the heater core and the control cables.
The heater matrix, in a Peugeot 206, can be replaced by removing the heater core and the hoses. With the heater core removed you can replace it with a new heater core.
Probably blocked heater matrix. Best thing to do is flush the cooling system with the best stuff you can get.
removing the heater core and temperature control cables
with a gallon of petrol and a lighter lol, or i can give you the scrap man's number that i used.
Leaking rear doors due to poor water channing inside the door. Remote central locking gremlins. Rust on rear arches. Heater matrix blockages. TDC / crank shaft / starter motor causing non start.
it depends on the car in question as they are all different mick from the AA
try changing the thermostat With mine it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!