Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-83728-p2gzdujs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-83728-p2gzdujs:47:15602)
    at /tmp/execjs20161208-83728-p2gzdujs:49:31860
    at a.r.perform (/tmp/execjs20161208-83728-p2gzdujs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-83728-p2gzdujs:49:31821)
    at r (/tmp/execjs20161208-83728-p2gzdujs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-83728-p2gzdujs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-83728-p2gzdujs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-83728-p2gzdujs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-83728-p2gzdujs:173:8

Q: AC causing knocking sound.

asked by on

The AC and heater will work sometimes on all levels on the switch. Both will produce hot and cold air. But then the AC/heater system will not work at all. If my truck sits a while, the system will work. When I start the AC, I can hear a knocking sound from under the dash.

A: The knocking noise is the temperature blend...

The knocking noise is the temperature blend door actuator trying to move the blend door. The actuator would need to be checked and replaced. I recommend having a certified mechanic, such as one from YourMechanic, come and inspect your vehicle's AC system for you. They will be able to repair or replace any of the components to get your AC functioning like normal again.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: No heat coming out when heater or defroster is turned on

Hello there, a variety of faults will cause your 2011 Chevrolet Silverado 1500 heat to not work with the defroster. If the heat works from other vent settings than it is likely an AC blend door motor is faulty. If...

Q: air conditioner not working

It definitely sounds like the IHKA control unit, especially since the displays are not working. One other possibility, and this still may be an issue if the blower cannot be controlled, is a failed final stage, which is a common...

Q: PCV Valve Location

This engine has only one PCV valve and it is located in the oil fill tube. If you need help replacing PCV valve contact a mechanic like one from YourMechanic to perform any services you need.

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...