Q: hi my a/c and my heater both come on together why ? the blowers are both working !

asked by on November 30, 2017

my a/c and my heater both are on at the same time why?

My car has 1650000 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Wipers not working.
Hi, I have ran across this many times on this vehicle. The most common cause of this is a bad connection at the wiper motor. There is a common issue with the terminals either coming loose or melting causing a...
How do I adjust the interior light dimming time?
When you open a door to your vehicle, the interior lights will come on, even if there isn’t a key in the ignition. When you then close the doors, the lights will stay on for a short period of time,...
How can I improve airbag safety?
Airbags are vital safety features that can reduce injury and potentially save your life if you are in an accident. There are a few things that you can do to ensure that the airbag does its job properly if it...
Car won't stay crank
I would need more information in order to give you a precise answer. It is impossible to determine what is wrong with your vehicle with just this description, but there are a few possibilities that I'll list. The starting issue...
I have a transmission out of a vehicle sitting on a trailer. It rained. Is the transmission ok or is it junk.
No, it should be okay as long as water is not getting in the transmission. If it did, then drain out any water and keep it covered. You may want to consult an expert to inspect the transmission in person...
Stalling
Hi there: The EVAP system is comprised of multiple components. Although the gas cap removal is the easiest job to complete and the source of many of these problems, another common issue is caused by the EVAP vent solenoid (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-evaporation-vent-solenoid)....
Car running hot
If the vehicle was not overheating prior to the replacement of the water pump, there are two obvious possibilities: when adding coolant back to the system, all air was not purged from the cooling system; and/or, the water pump doesn't...
power steering issue
If the system was recently opened up to replace any parts, what you are describing is typically a consequence of air trapped in the system, and consequent aeration of the power steering fluid, which builds pressure in the reservoir. Check...
My car shakes and jerks back when I accelerate. When stopped at a light vibration through steering wheel it is an Audi A4
Hi there. When you are getting an engine vibration as you described and you have a gas cap warning light issue, then it is likely that you have an issue with an EVAP canister or the purge solenoid. The canister...

Related articles

A Buyer’s Guide to the 2012 Nissan Armada
If If you need an SUV that lives up to the name “full-size SUV”, the 2012 Nissan Armada just might be your best option. With up to eight passenger seating and a 317-horsepower V8 engine that hauls 9,000 pounds with...
The Best Used Cars to Buy If You’re an Interior Designer
As As an interior designer, you need to transport a great many different items, including fabric, paint and wallpaper samples and sometimes even furniture items. You probably don’t handle overly large loads very often, and when you have to, you’ll...
The Best Used Cars to Buy If You're a Farmer
If If you're a farmer, you know that what you need isn’t a used car – it’s a used pickup truck. How else are you going to haul around hay, implements, garden produce, fertilizer, and all the other things you...