A/C Shutting off at lights?!
07-01-2013, 08:05 PM
#11
Eat. Sleep. Lift.
Most often the problem with the a/c is airflow through the radiator/evaporator.
Think about it, the evaporator cools the refrigerant by air flowing through the radiator/evaporator. When the vehicle slows or stops, the only airflow through the radiator/evaporator is what the engine mounted cooling fan will draw through the radiator/evaporator.
1st make sure to "blow" the evaporator/radiator clean with a garden hose or LOW pressure household pressure washer. If you just can't tolerate the extremes in temperature consider changing from you engine mounted cooling fan to efans that will be turning at a steady speed and drawing a greater amount of air through the radiator/evaporator at low speeds provided you wire it properly the fans will run at a certain speed/rpm when the a/c is turned on.
Poor design from Ford? Well maybe they were just behind the times until 2010 when all f150's came with factory efans.
A refrigerant leak is a concern, especially with older vehicles. But then, your car/truck would be warm most of the time. A free a/c check wouldn't hurt. Either way you go make sure the radiator/evaporator is clean. Easy to do when you wash your vehicle.
Reason for edit...........misuse of the term evaporator. Condenser should have been the choice, doh!
Think about it, the evaporator cools the refrigerant by air flowing through the radiator/evaporator. When the vehicle slows or stops, the only airflow through the radiator/evaporator is what the engine mounted cooling fan will draw through the radiator/evaporator.
1st make sure to "blow" the evaporator/radiator clean with a garden hose or LOW pressure household pressure washer. If you just can't tolerate the extremes in temperature consider changing from you engine mounted cooling fan to efans that will be turning at a steady speed and drawing a greater amount of air through the radiator/evaporator at low speeds provided you wire it properly the fans will run at a certain speed/rpm when the a/c is turned on.
Poor design from Ford? Well maybe they were just behind the times until 2010 when all f150's came with factory efans.
A refrigerant leak is a concern, especially with older vehicles. But then, your car/truck would be warm most of the time. A free a/c check wouldn't hurt. Either way you go make sure the radiator/evaporator is clean. Easy to do when you wash your vehicle.
Reason for edit...........misuse of the term evaporator. Condenser should have been the choice, doh!
Last edited by amick218; 07-01-2013 at 09:45 PM.
