you probably have air trapped in the system. Have dealer or radiator shop bleed system.
I assume your cooling fan is working.
what engine v6 or v8?
SECTION 303-03: Engine Cooling
2001 Lincoln LS Workshop Manual
DESCRIPTION AND OPERATION
Engine Cooling
The cooling system components include the:
- block heater (optional)
- cylinder head temperature sensor
- fan blade, fan motor and fan shroud assembly
- radiator
- pressure relief cap
- degas bottle
- radiator draincock
- water pump
- oil cooler (optional)
- water thermostat
The water thermostat:
- controls the engine coolant temperature.
- allows quicker engine warm-up.
The degas bottle:
- provides a location for system fill.
- contains coolant expansion and system pressurization.
- provides air separation during operation.
- replenishes the engine coolant to the system.
The fan blade draws air through the radiator to help cool the engine coolant.
The fan motor:
- operates only when the engine is running.
- will not operate when the engine is off.
The engine coolant flows:
- from the lower radiator hose to the water pump.
- from the water pump to the engine block and the cylinder heads.
A closed water thermostat returns the engine coolant to the water pump. An open water thermostat allows the engine coolant to flow to the radiator.
Unsatisfactory coolant materials:
- Alcohol-type antifreeze does not provide adequate water pump lubrication.
- has lower boiling point
- reduced antifreeze protection
- Alkaline brine solutions will cause serious engine cooling system damage.
The cylinder head temperature sensor provides a signal to the temperature gauge.
- will invoke failsafe cooling.
The optional block heater:
- electrical heating element is installed in the block cooling jacket.
- uses a standard 110V (220V in Europe) electrical supply
- keeps the engine coolant warm during cold weather.
The auxiliary water pump (3.9L only):
- provides heater coolant flow boost.
- has a secondary function of providing engine-off cooling.
my nissan altima blows cold air when the heater is on if the car is idling or stopping at red light.
MY HEATER BLOWS COLD AIR WHEN IDLING AND HOT WHEN MOVING AT HIGH SPEEDS..HOW DO I FIX THIS?
Heats on....warm air comes out...no heat though???
My Nissan Altima loses or no heat when idlding and when at a stop . Will blow hot air when driving .
My 02 Altima blows cold air when idling or at low speed. Will warm up on the highway
My heater does the same thing...cold when stopped at lights or drive thrus and only hot when on the highway
I have a 2005 Altima that also only blows warm/hot air when the vehicle is in motion. When the car is idling at a light, for example, the temperature drps to a very cool temperature. This started about a month ago and I haven't attempted repair yet since I live in a warm state. Any repair suggestions would be great.
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