Q: I hear a water sloshing sound when I start and when I stop the car

asked by on October 17, 2016

I recently bought this used car at a dealership. I hear the sound of water sloshing when ever I first crank up the car and occasionally when I start and stop. There is also a weird clicking noise when I turn off the air. Everything I have researched says that there is possibly a blockage in the ac line and the system just needs to be bled. The ac works though it is not as cold as it could be. I took it to a local mechanic and he said that the compressor needs to be replaced. I do not want to pay 1000+ especially if that is not the problem. Should I get a second opinion? How likely is it that the compressor needs to be replaced as compared to a more minor problem?

My car has 97000 miles.
My car has a manual transmission.

AC Compressor Replacement $715.49 - $3134.49 Get a Quote
Heating AC Inspection $94.99 - $114.99 Get a Quote

Hi there. Getting a second opinion is always advisable when it comes to working on your vehicle. The sloshing sound you hear, when your vehicle starts, most likely is air trapped in the heater core. The solution to this problem is to have the coolant system flushed. The clicking sound when the air is turned off, most likely is an actuator that controls the temperature blend door, the mode door, the recirculation door in the air distribution housing. This may account for the AC not blowing as cold as it could. There is the possibility, the AC system refrigerant is low. This could be result of a leaking AC compressor. I recommend having your vehicle’s heating and AC system be diagnosed and repaired by a certified technician from YourMechanic.

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

Is the vehicle available with a cigarette lighter and ashtray?
Beneath the controls for the AC and heater, there are two power outlets.The outlet on the left can be switched out for a cigarette lighter very simply. To use the lighter, push it into the socket until it clicks and...
Tugging while shifting from first to third gear, the engine lacks power
Hi there. The most common cause of this is a bad catalytic converter (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-catalytic-converter). When it fails, it will clog internally and will restrict the exhaust. This will cause a serious lack of power like what you are experiencing. It...
I want to eliminate the ac compressor what do I do and how to do it
Depending on the vehicle you have, you may be able to get an A/C eliminator kit from an auto parts store or online. This kit is designed to allow you to eliminate the A/C and sometimes use the same belt....
Engine is knocking and it shakes the car while idle.
It is possible that some internal damage may have happened to the transmission due to the low fluid level. Then the transmission is not performing properly, it can affect the way that the engine runs. I would recommend having your...
No brakes
If the brake pedal is going to the floor even after replacing master cylinder and rear brakes you still have air in the brakes. You may need to use a pressure bleeder to push fluid through the system and bleed...
trouble codes PO101
Hi there. There are 5 things that can cause the engine light code P0101 (https://www.yourmechanic.com/article/-p0101-obd-ii-trouble-code-mass-airflow-maf-circuit-operating-range-or-performance-problem-by-john-nelson) to come on. The mass air flow sensor (MAF) could be dirty, the MAF could have failed, the air intake could have a leak, there...
Metallic ringing(bell maybe) sound when accelerating or engine under load?
Hi there. If I had to guess, based on your inquiry, my first thought would be to check your oil level, as commonly this type of noise is related to a lack of lubrication in the cylinder heads and the...
I just rebuilt my 65 RFE transmission and it works great but am getting the code 4th gear ratio incorrect.
Check the transmission fluid and see if its full and clean. If the fluid is original, then I suggest flushing out the fluid and changing the transmission oil filter. If the fluid is good and has been changed, then the...
Car won't start
Hi Jessica. Thanks for contacting us today. With turbo-charged four-cylinder engines, diagnosing a starting issue can be more complex than the traditional "getting fuel / getting spark" process. In some case, a faulty or worn out wastegate or other turbo...

Related articles

A Buyer’s Guide to the 2012 Kia Optima Hybrid
Kia Kia has really turned over a new leaf with their cars in the past few years, and the 2012 Kia Optima Hybrid is certainly no exception. With the same attractive design as the Optima, higher fuel efficiency, and a...
The Best Used Cars to Buy If You're a Personal Assistant
As As a personal assistant, you have a lot of demands placed on your time. Often it’s important that you be able to get around town quickly, running a ton of errands, picking things up here, dropping them off there,...
Symptoms of Bad or Failing Brake Pads
If your brakes are noisy, the brake pedal is pulsating, or the brakes are responding poorly, you may need to replace the brake pads.