Question about Nissan Altima
The car warms up to temperature according to the temperature gauge, however, I can only get warm air out of the vents, even when temperature is set to 90...
Thermostat is stuck open. or you have an air pocket in the cooling system or the bypass door is stuck in the wrong position.
Posted on Oct 14, 2013
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Posted on Jan 02, 2017
check water level in rad if ok check thermostat or couldbe a plugged heater core.also check for vacum to heater door is working
Posted on Nov 21, 2008
All three of the above answers are incorrect. There is no need for freon to be introduced into the system, if the system is fully charged. If you do this, and follow the above advice, you will damage your AC compressor. What you need to do is get the vehicle hooked up to a set of refrigerent gauges at a local competent service center, and the pressures will tell your competant mechanic what to do next. NEVER 'add freon' if you are not 100% sure that the system is low.
Posted on Aug 29, 2009
On a newer truck such as yours, the problem is usually the blend door actuator. First try a recalibrations of the system. Remove the HVAC fuse for a couple minutes and then put it back in. Start the truck and let it idle for a few minutes. Check to see if that fixed it. Fig. Remove the floor air outlet duct extension (1) from the floor duct (2) Fig. Blend door actuator and related components
If not, next check the actuator. I will paste instructions below for taking it out. Once you have it out, plug the connector back in and see if it turns when you change the temperature control. If not, the problem can be in the controller or the actuator. If it is clicking, the problem is stripped gears. If it isn't doing anything, you can check for voltage at the connector with a voltmeter. Connect the black meter lead to a good ground point and probe the connector terminals with the red lead while changing the temperature setting. The part costs $140, so do what you can to make sure it's bad before putting a new one in. Also, it may be worth your time to read my post at http://www.fixya.com/cars/r6235876-no_heat_fan_blowing_cold_air for other ideas. Please let me know if you have questions.
2. Disconnect the electrical connection at the blend door actuator (10).
3. Remove the blend door actuator mounting screws from the HVAC module.
4. Remove the blend door actuator as an assembly with the actuator cam.
Fig. Remove the blend door actuator mounting screws from the HVAC module
Fig. Remove the floor air outlet duct extension (1) from the floor duct (2)
Fig. Blend door actuator and related components
Posted on Oct 31, 2010
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