a/c problems

I'm wondering why my coolant reservation tank makes a bubbling sound after I stop my truck. It only happens when I use my a/c

My car has 148676 miles.
My car has a manual transmission.

Experienced mechanics share their insights in answering this question :
You may have a cooling fan clutch that is not working properly. The fan might not be turning as fast as it should. When the A/C is on the temperature rises in the condenser and transfers the heat to the radiator. This will cause the coolant to get hotter and may cause the boil problem.

You should also have the coolant drained and flushed out to clear any clogged radiator problems. Have the radiator checked to see if you have flow issues in the core. This can be done with a laser temperature sensor and check the radiator core at different places to see if some of the cores are blocked. If flushing does not clear the radiator blockage then replace the radiator.

I’d suggest you get some assistance from a qualified technician who can diagnose the issue with your A/C and fix it accordingly.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The most common reasons a Chevrolet S10 ac isn`t working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. You may not realize there`s a refrigerant leak until the air conditioner stops blowing cold.
Fig. 4: 2.8L engine . Firing order: 1-2-3-4-5-6 .
With the AC off, the clutch does not spin. When you turn the AC on, the clutch can make a momentary click and starts spinning with the belt and pulley. If the clutch does not engage, or if it makes a screeching or whining sound when it does, the compressor needs to be serviced.
If the compressor is turning on and off fairly quickly then that means that there is still a pressure issue. It can be caused by low refrigerant or high pressure. It can also be caused by a bad A/C pressure switch. Any of these will cause this to occur.
If your air conditioner is running, but not lowering temperatures inside, one issue could be a blocked or clogged condenser coil. When operating correctly, the condenser fan draws air into the outdoor unit through the condenser coil to pull heat energy out of your home.
However, a firing order of 1-2-4-6-5-3 is common on medium-speed marine engines. V6 engines with an angle of 90 degrees between the cylinder banks have used a firing orders of R1-L2-R2-L3-L1-R3 or R1-L3-R3-L2-R2-L1. Several V6 engines with an angle of 60 degrees have used a firing order of R1-L1-R2-L2-R3-L3.
If your AC unit keeps turning on and off repeatedly, then it`s probably experiencing short cycling. Short cycling generally refers to a condition where the AC system`s cooling cycle stops prematurely and turns on again after a short while, like every 5-10 minutes depending on the system`s condition.
The constant running will reduce pressure in the cooling coil until it freezes over, which is dangerous as it can cause liquid refrigerant to flood back to the compressor and damage it (the compressor is a very expensive part).
Most AC clutches are designed to spin freely when disengaged, and also with the pulley and compressor when those are engaged. If the clutch spins freely at all times, and the compressor never comes on, then it may not be engaging and therefore needs to be replaced.
If you can hear the compressor running but the fridge isn`t cooling, the problem is most likely either frost-clogged evaporator coils or a stuck or broken evaporator fan. If you hear no sounds and the compressor isn`t running, or you hear a click, inspect the overload relay, start relay, and start capacitor.
Try cleaning your air conditioner`s filter and the coils to see if improving the airflow fixes the problem. If there is ice buildup, you`ll need to run the unit with just the fan in order to melt it off. If that doesn`t get the unit blowing cold air again, it could be refrigerant levels are low (see below).
1 is the most forward cylinder. V-6 or V-8 engines. Most V-type engines use the left front cylinder at cylinder No. 1.
Simply put, a V6 is a 6-cylinder engine. Whereas, a V8 means an 8-cylinder engine. But, you may wonder what the `V` means in V6 and V8. The `V` represents the way cylinders are arranged in your engine. V-type engines have cylinders placed in a V-like shape, or to put it the other way, in two equal rows.
Most V6s have six spark plugs — one for each cylinder. However, some have a twin spark engine with two spark plugs per cylinder — making it twelve in total. To confirm, check your owner`s manual to tell the number of spark plugs and type of engine you have. Or just visually inspect your engine bay for an answer.
Firing order in an engine is important because a correct firing order can cause minimum vibrations in the system. Minimum vibration in automobiles is desired as the ride can become smooth and the driver and passengers wont feel the vibrations being transmitted by the engine as it is very less.
Yes, this is possible. However, unless it was the AC compressor clutch and pulley which failed, bypassing the AC pulley is unnecessary. Simply disconnect the wire to the AC compressor clutch and that should do the trick.
Yes, you can technically replace the clutch without removing the compressor. The reason people suggest doing them together is that when one fails, the other usually isn`t too far behind it. It`s just a matter of convenience to replace them both since you`re already doing most of the same steps anyway.
Yes, you should usually be able to rotate a car`s air conditioner compressor clutch by hand. It won`t spin around at the daintiest touch of a finger—you may need to put a modest amount of effort into it—but it should be spinning.
If the condenser unit of your AC starts to malfunction, it can severely limit your air conditioner`s ability to cool down your home and even cause it to break down completely. Failing to address this issue in a timely and effective manner can lead to component failure and even force you to replace the entire condenser.
Yes, you can replace only your air conditioner`s condenser unit. However, you may save money by replacing the entire air conditioner if the system is more than a decade old.
If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged.
It is safe to do so, but regular maintenance is even more important because there`s more wear and tear on the system. Many people believe it`s more efficient to run your air conditioning all day. This is because the unit will never have to work too hard at any given point to cool the home.
The short answer is that your AC compressor and refrigerant should last about 12-15 years. Learning what crucial components, and how to maintain the compressor, can keep your AC running efficiently for its entire lifespan.
As long as your air conditioner is properly sized for the room or home and summer temperatures are moderate, your compressor may only run 70% of the time. This means that every 24 hours, your compressor is running for about 16 hours.

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AUDI A3 1.6L – Engine overheating and temperature needle starts above minimum
ANSWER : Hi, thanks for writing in. It is possible that you could have a faulty water pump. The water pump is designed to circulate the coolant through the engine. The water pump has an impeller inside of it and it physically moves the fluid. If this impeller is broken off, it will not make any noise and will not pump any fluid. I would recommend having a qualified professional take a look at your water pump to inspect for damages. This will most likely include removing the water pump from the engine. If the impeller has fallen off of the water pump, replacement of the water pump will resolve this overheating issue that you are having.

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Electrical or transmission problems with Hummer
ANSWER : Hi there. This vehicle is known for having a history of electrical issues. From the symptoms you are getting it sounds like a bad ignition switch or a failing body control module. Most of the time it is the ignition switch. When it fails internally it causes these systems to act up almost like the key is being turned off and on. This can be diagnosed with a voltage meter by doing a voltage drop test on the switch. If the switch is fine then the body control module will need to be replaced. If this is something that you want to have diagnosed, consider YourMechanic, as a certified mechanic can come to your office to inspect your electrical problems.

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While diriving my 2017 honda civic my dash displayed powered steering (eps) problem, what does this mean?
ANSWER : Yes, all of those issues should be checked out, especially as the warning lights involve key vehicle safety systems like the steering system. Your vehicle is under warranty as it is brand new. You should bring the car back to the dealer and have them resolve the issues at no cost to you. If the issues recur, be sure to follow up, as needed, and if the issues are not permanently resolved, in a reasonable number of visits to the dealer, keep in mind that very specific, and very protective (of the consumer) state and Federal Lemon laws apply to new vehicles. I mention all this because you are driving a brand new car and yet all these warning lights have appeared. That’s not an expected outcome and thus you should follow-up promptly and make sure this gets fully and thoroughly resolved. If you have further questions or concerns, please do not hesitate to re-contact YourMechanic as we are always here to help you.

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Audi A3 2001 1.6L – Overheats and goes back to normal
ANSWER : This is a sign of a faulty coolant fan relay switch. When this is not working properly, this can cause the fans to come on intermittently, or sometimes stay on all the time or not come on at all. When they do not come on at the right temperatures, this will cause the overheating as you describe. A certified YourMechanic technician can come to your location to perform a Car is overheating Inspection on your vehicle and help you diagnose and repair this issue.

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Start problem with good crank.blown head gasket.
ANSWER : Hi there:

In most cases, the symptoms of white smoke and needing to add coolant frequently mean you have a blown head gasket. It can cause inconsistent starting problems as you’ve described, but it’s also possible that the crankshaft position sensor is also damaged. Changing a head gasket is a rather expensive repair, but using "bluedevil sealer" will not solve this problem. You might want to have a professional mobile mechanic complete a car is hard to start inspection to determine why your Altima is having this issue.

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I was already having transmission problems. Will constant use of Cruise Control further deteriorate it? Will it cause CC problems?
ANSWER : Hi, thanks for writing in. The cruise control uses some of the same sensor inputs the transmission uses and can indeed affect the transmission and cruise control. If the transmission is slipping then the cruise control may not control the speed steady. Have the transmission problem diagnosed and fixed then see if cruise control problems go away.

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ANSWER : Hi there – this behavior sounds like a throttle position sensor problem. Check first for any problem codes, whether the Check Engine light is on or not. Most auto parts stores will do this for free on a "time-available" basis. I recommend a engine idling problem performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

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