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Why is there no heat in a 2000 mercury cougar after changing the themostat?
Wiki User
∙ 13y ago
If this happened immediately after changing the thermostat, then the most likely problem is the thermostat was installed backwards.
The spring side of the thermostat faces the engine. It's the spring that is reacting to the coolant temperature and driving the valve to open/close.
When the thermostat cannot open, that prevents any coolant from ever getting to the heater core. Thus, you shiver a lot!
Pop it out, flip it over and you should be all sorts of warm and cozy.
Wiki User
∙ 13y ago
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