Then diagnose it and fix it. There is more than one possible reason why this is happening. Narrowing it down requires diagnosis. Either you have blockage in the coolant lines or passages, a faulty thermostat, a faulty water pump, or a bad belt driving the water pump.
The coolant should circulate through the entire water system.
how to changing engine coolant on a 1993 mercury grand marquis gs.
When the car is cold the thermostat is closed. When the thermostat is closed the coolant does not circulate or get in to the engine block.
The Villager engine does not have a coolant bleed valve.
your thermostat is closed. needs to be replaced. inexpensive part but can save your engine from overheating.
The water pump circulates the coolant throughout the engine. When a pump fails on a 1997 Hyundai the coolant will not circulate properly and cause the engine to overheat.
On a 2002 Mercury Sable : The engine coolant reservoir is at the front of the engine compartment , on the passenger side of the engine compartment ( the engine coolant reservoir has a thread on cap on it , that is your pressure cap / radiator cap )
The coolant temperature sending unit on a 97 Mercury Sable is in the engine compartment. It is located on the intake manifold.
To circulate coolant through the engine block, radiator and passenger compartment heater core.
The issue of the heater blowing cold air at low engine speeds in a 2000 Mercury Sable is often caused by insufficient coolant flow, which can occur when the engine is idling. At low RPMs, the water pump may not circulate coolant effectively, leading to inadequate heating. Additionally, a malfunctioning thermostat or air trapped in the cooling system can also contribute to this problem. Once the engine speed increases, the water pump operates more efficiently, allowing proper coolant flow and restoring heat to the cabin.
I believe you have lost your engine coolant
No. When the engine is running coolant is heated and expands. Excess coolant then flows from the radiator to the expansion (overflow) tank. When the engine is shut down coolant cools and contracts drawing fluid back out of the tank to keep the radiator topped off.