Manuals through 2025 now available!
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LEMON is the spiritual successor to CHARM, I recommend you try it!
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Coolant Temperature Sensor / Switch HVAC: Description and Operation
Coolant Temperature SwitchA coolant temperature switch is fitted to the lower side of the heater matrix inlet pipe. Its contacts are open at temperatures below
40°C, this prevents the fans from operating when heat is required until relatively hot coolant is flowing through the system.
