Mechanics

HEATER

2000 Toyota Celica • 4 cylinder •

Heater is blowing cold air 90% of the time. Temperature gauge is spiking to overheat randomly than back to normal 2sec later.
Avatar
T_hess
March 15, 2011.



Try replacing the thermostat and see what happens

Rasmataz
Mar 15, 2011.
Already did.

Tiny
T_hess
Mar 15, 2011.
I already did.

Tiny
T_hess
Mar 15, 2011.
Have radiator cleaned, bay bed part blocked in the cores restricting circulation, not just a back flush but a full clean by a radiator repairer.

Mhpautos
Mar 15, 2011.
The erratic temp indicates there is air in the system and it needs to be bled out thoroughly. Using a vacuum fill method is the best way to get all the air out.

Wrenchtech
Mar 15, 2011.