When to turn on the thermo coolant fan?
This is a very critical time to get the car home or to a place where it will not be driven until it is looked at. In other cases, the switch will turn on and stay on well past the cooling temperature threshold, resulting in the fan running even when the engine is off. 3. Broken or shorter signal wire
Why does my thermo coolant fan keep grounding?
As mentioned earlier, there are two wires inside the switch. When one of these is broken it can cause them to ground intermittently, which will cause the fan to also work intermittently.
Why does my Jetta not have a cooling fan?
Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting plenty of air flow through the grille to keep things cool without the assistance of the fan. Its possible that you have no problem at all. Was this answer helpful? I got a 2002 Jetta the cooling fans don’t turn on .
How does a coolant fan switch work on a car?
A coolant fan switch is a small and very simple switch comprised of typically two wires. This switch is configured to work based upon the temperature of the engine. As engine temperature rises to a specific threshold, the switch is activated powering on the coolant fan.
Why are the cooling fans not running on my Pontiac?
The stock engine comes with a plastic intake manifold gasket, which is prone to failure. It leaks coolant into the cylinders and causes inefficiency in the cooling system, leading to low coolant and overheating. You can replace this gasket with a metal one, the repair is a little involved but I managed with a Haynes manual. Good luck!
How does the cooling system work on a Pontiac?
The PCM sends the signal to the BCM, which turns the fans on. Or you can buy a separate temperature fan relay system with a temp probe and bypass the system. It will work as normal cooling when needed only. Its the connecter that you unplug from the temp sensor.
Why is my Pontiac Grand Am GT not cooling?
It leaks coolant into the cylinders and causes inefficiency in the cooling system, leading to low coolant and overheating. You can replace this gasket with a metal one, the repair is a little involved but I managed with a Haynes manual. Good luck! My 2000 Pontiac Grand Am GT (6 cy/3.4L) has been having cooling issues.