I have no heat in my 2000 ford excursion v10 i changed the thermosat in it then now i have no heat from the truck now what did i do wrong? i placed the theromsat a three clock postion in the housing like it said but no heat please help cold family here

Hi,

Did you bleed the air out of the system after replacing the thermostat and topping up the coolant?

The most common cause of this following work on the cooling system is an airpocket preventing the correct circulation of coolant in the heater matrix.

To bleed the system all you need to do is remove the cap from the radiator or overflow tank and allow the engine to tick over for 10 to 15 minutes. Ensure the heater dial is set to max and fully turned on when doing this. This will expel any air that is trapped in the cooling system. Top up the coolant as the air is expelled.

Other possible causes are a faulty thermostat (stuck open) even though it is new or one that is incorrect for your engine or the incorrect temperature thermostat has been fitted.

Also your cooling system may need to be flushed if there is debris in the radiator or heater matrix.

Let me know how you get on.

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