Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-5336-1mdeiikjs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-5336-1mdeiikjs:47:15602)
    at /tmp/execjs20161208-5336-1mdeiikjs:49:31860
    at a.r.perform (/tmp/execjs20161208-5336-1mdeiikjs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-5336-1mdeiikjs:49:31821)
    at r (/tmp/execjs20161208-5336-1mdeiikjs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-5336-1mdeiikjs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-5336-1mdeiikjs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-5336-1mdeiikjs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-5336-1mdeiikjs:173:8

Q: Low coolant light comes on when AC, defrost or heater is on, but only if the car is in gear and stopped, what's wrong with my car?

asked by on

My low coolant light comes on when AC, defrost or heater (I will just say AC for short, the problem applies to all) is on, but only if the car is in gear and stopped. If I stop at a stoplight with the AC on the light comes on within 30 seconds, the light goes off as soon as the car begins moving again or if I turn the AC off. If I sit through the light with the AC on and the light lit up, at the next light the low coolant light will not come on. If the car is on and in park with the AC on the light doesn't come on. This happens in all weather and temperatures, at any time of day, whether the AC is on when I start the car or not, or if I let the car warm up before I turn it on or not.The AC, defrost and heater all work well, regardless of the low coolant light being on. I can't hear, feel or smell anything unusual, the engine coolant level is full, the temperature gauge reads normal temps.

My car has 107000 miles.
My car has an automatic transmission.

A: First, you want to make sure your cooling s...

First, you want to make sure your cooling system is full. Check the radiator not the coolant jug. And check it when it is cold. If it needs coolant, add some. Of course, I don't feel this problem is an actual low coolant condition. I would expect to find an electrical failure in the instrument cluster or from a component or wiring harness that is connected to the instrument cluster.

As a technician, I have access to reports from technicians across the country. I could not find any reports of this problem, so diagnosing this will require an experienced tech as this is not a common problem. In addition, this happens at intermittent times making it difficult to recreate. The most challenging part of this diagnosis will be recreating the symptom. I suspect it has something to do with the brake switch circuitry because it only seems to happen when you have your foot on the brake. I would begin my diagnosis there with a wiring diagram and test light in hand. The brake switch, instrument cluster, and environmental controls all interact with each other. Something is crossed either because of a failed module or damaged wiring in a harness.

Aside from making sure the coolant is full, this will not likely leave you on the side of the road. If you take it in to be diagnosed, be prepared for them to spend more time than usual to figure it out. Since it isn't a key problem, you may need to live with it until it completely fails making it much easier to diagnose. Either way, I do recommend having a certified mechanic diagnose the warning light to make sure there isn't anything serious going on.

Good luck.

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: Car won't start - Chevy

Hi there, thanks for writing in. This sounds like you may have an electrical short somewhere in the wiring behind your dash, or you could also potentially have a grounding problem. If you'd like help with this issue, consider having...

Q: Actuator might need replacing.

The clicking noise you hear in the dash is most likely the temperature blend door actuator motor has gone bad. This also would cause a/c problems like lack of temperature control. You could have any mechanic install the parts for...

Q: Turn signal isnt working but hazards do

Hello. Your hazards are sent a constant source of power from the battery for emergency situations, while the turn signals are designed to be sent through the ignition switch. They will only turn on if the vehicle is on, and...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...