Hi Scotty. I have a 2017 Honda civic 2.0 engine with 45,000 miles. The air is not working when it's turned on. I checked to see if the compressor clutch is turning and it is. I also checked the vents to see if any of them blew cool and the one on the passenger side closest to the door window was lukewarm compared the other three which were hot. I've checked the cabin air filer and it is clean. Could it be that it's low on refrigerant?
There's a manufacturing defect with a lot of condensers from factory. There's an extended 10 year warranty on the condensers so you might be able to get it replaced for free as long as they don't see any external damage to the condenser from foreign objects.
https://static.nhtsa.gov/odi/tsbs/2019/MC-10163796-0001.pdf
@civicdriver_ Please copy+paste your response as ‘Your Answer’ below, thanks.
You can use a manifold gauge set to check system pressures and get an idea of what's going on. It's also possible your blend door is out of whack and not letting cold air into the ducts. You'd need a professional-grade bidirectional scan tool to test that.
https://www.youtube.com/watch?v=0HCSsv3uYfM
https://www.youtube.com/watch?v=_IBFLMYZEzI
'll check the refrigerant once the adapters come in.
Bear in mind that modern compressors are variable displacement and may show good pressures even if the refrigerant is a little low. (If very low on refrigerant of course that will show up as low pressures. The compressor can only compensate so much.)
Great that you can actually see your blend door to check its operation, can't do that on a lot of vehicles.
The only way to really know if you have the correct amount of refrigerant is to evacuate and recharge the system with the correct amount by weight. Unfortunately that's an expensive proposition with r1234yf, which is much more expensive than r134a even though the latter has nearly doubled in price over the last year.
Dang well i hope i won't have to let it all out. I did publish a video on youtube for a noise that I was hearing. Here it is:
https://youtube.com/shorts/_MI-bFB3WDY?feature=share
Although it's not proper procedure, with R134a systems that are low on refrigerant you can sometimes get away with slowly adding a little bit at a time while watching pressures and vent temperature and stopping when it's working "good enough". You have to be careful not to overcharge. Modern AC systems are sensitive to being even a few ounces off. I have no experience with R1234yf though and don't know how that would work out.
There's a manufacturing defect with a lot of condensers from factory. There's an extended 10 year warranty on the condensers so you might be able to get it replaced for free as long as they don't see any external damage to the condenser from foreign objects.
https://static.nhtsa.gov/odi/tsbs/2019/MC-10163796-0001.pdf
I have a gauge system but i dont' have the adapters for 1234yf so i ordered some to check. Ilooked at the blend door actuator to see if that was working and it was moving when i swapped from cold to hot and hot to cold. I'll check the refrigerant once the adapters come in.