Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [refrigerant]

26 questions
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Is it okay or useful to run heat and AC at the same time?

Most cars that I've seen in my life have a heat slider or dial, which goes from coldest to hottest, and also a button or switch that is labelled "AC". When the heat dial is set to cold, turning on the AC switch makes it even colder. I was under the…
snetch
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Will running engine after replacing A/C components ruin the new compressor before system is recharged with freon/oil?

I have replaced the air compressor (which came oiled from factory), condenser, evaporator, and expansion valve on a 2002 Honda CRV. I also replaced the alternator. I want to turn the engine on to make sure the car is running properly, sans AC, and…
EthanT
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What exactly is R-1234yf?

I keep on reading about a new refrigerant, R-1234yf, that is being adopted by some automotive manufacturers. What is this refrigerant all about, why are manufacturers considering it and what makes it different from R-134a?
Zaid
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Is it safe to vent R-1234yf to atmosphere?

There are reports that suggest R-1234yf has a global warming potential (GWP) less than 1, even outperforming carbon dioxide: The study found HFO 1234yf to have a GWP of less than 1. CO2 is considered the baseline with a GWP equal to 1. Earlier…
Zaid
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4
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My AC compressors won't run, and the systems won't take a recharge. What should I check next?

I have a 2012 Ford E-350 cutaway with a Starcraft Allstar bus body (70k miles). The front AC is the OEM Ford equipment, and the rear AC is from Trans/Air (I don't have exact model numbers, but I'm looking for them). There are two compressors driven…
Moshe Katz
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How much Pag oil should be added after recharging refrigerant?

I have a 2003 Citroen c5 which I bought last year, the A/c system has been empty for refrigerant since before I bought it. I have purchased the necessary equipment to vacuum, and recharge the system. in the manual, it says that the system takes…
Kristian27
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Refrigerant load

I will be replacing the AC compressor on a 2020 Cadillac XT5. I need to know what the refrigerant load is for this vehicle. It uses r1234yf refrigerant. The new Delco compressor comes with the correct PAG oil in it already. How many ounces of…
Pᴀᴜʟsᴛᴇʀ2
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Is 7% refrigerant loss per year worrying?

I some time ago had my car's air conditioning system serviced, when the car was 2.5 years old. It was functioning okay, but I opted for the service because I wanted to have a measurement of the refrigerant loss. The receipt I have says: Recovered…
juhist
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Please help! I found two R-134a temperature pressure charts online. For recharging a 2011 Hyundai Santa Fe, which one should I follow?

The chart on top is what I found more commonly on the internet, but the chart at the bottom is used by a YouTube mechanic I like. The numbers on these two charts deviate quite significantly. For example at 85 Fahrenheit, the top chart says 45-55…
jeffrey
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Recharging A/C - adding oil, UV dye, & stop leak

So my car broke down due to a transmission cooler line leak. Had it towed to a shop where they diagnosed the issue, replaced the cooler lines and at their recommendation replaced the radiator. I pick up the car and after about 15 minutes of driving…
David Wilson
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What happens if you disconnect the AC lines from the compressor?

I'm watching this repair video that replaces the AC Compressor and I'm exploring how feasible it is to just replace the o-rings on the hose and compressor side of the AC Compressor's ports. I'd like to know what would physically happen when you…
jxramos
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My car A/C lost all of its refrigerant

My car lost all of its refrigerant. I went to mechanic he checked my entire ac system for leakage but couldn't find any. He pressurized the cooling coil and also compressor but he couldn't find any leakage. After that he refilled refrigerant only. I…
Muhammad Ashar
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Normal AC refrigerant pressure range?

Long story short: the ac of my 2013 Rogue is not working and I am in the process of eliminating various possibilities. One of these is the amount of refrigerant in the system. Hence my question: With the engine off, what should the normal range for…
Joseph C.
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Adding Oil to A/C Compressor After Refrigerant Leak?

I recently retrofitted the A/C system on my 1987 Toyota 4Runner for R134a. This included: resealing original Denso 10P15C compressor, flushing the evaporator, condenser, and lines, installing a new drier, and adding the correct amount of PAG oil as…
Chris
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when is a/c pressure too low

Last fall I noticed a small hiss when starting the a/c. I looked around the system and noticed a thin film of oil/dirt around the high valve. I guessed my high pressure shraeder valve to be leaking so I stopped using the a/c as I had read that an…
redbeard1
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