What to do when your car AC blows warm at idle?
GM and others use either a three-relay set up to run the two fans at low speed for normal driving and high speed when the AC is on or the low speed can adequately cool the radiator. Other carmakers use a solid-state speed relay that varies the speed of the fans based on engine cooling and AC needs.
What causes a heater to blow cold air?
The following are some issues that may be causing the heater to blow cold air: Low coolant levels. A plugged/clogged heater core. A faulty thermostat (thermostat that is stuck) Broken blower and/or blower motor. Heater core bypass hoses that have leaks.
Why is my Jeep heater cold when idle?
The heat is abnormally cold while idle, but will pickup after accelleration. Heater core replaced last 2,000 miles.147k on the clock. …less than 100 miles and is still the problem. ??? Check the heater hoses in the engine bay for any kinks or sharp bends, this would restrict the liquid flow. KYB Gas-a-Just shocks / Transgo reprogramming shiftkit.
Where to put the water pump when installing a thermostat?
It should be high on the water pump (1/4 in. pipe) right next to the thermostat housing if you have it. Also, when you install the thermostat you should make sure the bleed hole in the thermostat is at the top. This also helps get the air out. Good luck and let us know what you find.
When does the AC work better at idle?
The high pressure readings are only occuring when the outside temp is 90 or higher. Now that the temperature is down in the mid 80’s the pressure as went back down a bit and the AC is working better at idle. I know the pressure changes with temperature change but I’ve never seen this drastic of a change. You ever get a solution?
Why does my car AC blow cold air?
If the fans aren’t running at high speed or one fan isn’t running, your AC may blow cold air when you’re moving because enough “ram” air is coming across the condenser coil to keep temperature and pressures low.
Where does the cold air come from in an air conditioner?
Behind the compressor, you have the evaporator. The evaporator is inside the passenger compartment, which is the low- pressure side of the system. It is basically where you get your cold air from. 4. Metering orifice Attached to the evaporator is a small device called the metering orifice.