2015 Toyota Sienna Rear AC Not Cooling Due to Expansion Valve Stuck Closed
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- čas přidán 12. 09. 2024
- If your front AC is OK but the rear AC isn't working it could be the rear expansion valve. A stuck expansion valve could cause no cooling if it's frozen closed or too cold /poor mileage / rough idle if it's stuck open. I show you how to access the rear AC and how to inspect the components there
Very thorough and helpful. Thank you. Trying to trouble shoot the heater not working in the rear of my sequoia.
Thank you for this. I have an older Sienna (2008) which is similar and it's hard to find any info on the rear assembly.
Good Explanation , very helpful
Similar situation on my home ductless heat pump. An evacuation and recharge would need to be done as part of the repair according to my diagnosis. Out of concern for the environment, I hired a licenced hvac tech to do the work as I didn't have a recovery machine. As I went out to check on the tech, he was letting the refrigerant out without using his recovery machine. wtf.
Hey great video. I think you just saved me a ton of time trying to figure out what is going on with my Sienna. I have the same problem it seems. Mine stopped working after a corroded rear ac line leaked out all of the refrigerant. It was about 4 months later that I decided to repair it. I have made 2 repairs to the rear ac lines but they are just too corroded to keep hacking them out, and I am not going to keep filling this ac system up so it can just leak out again, nor do I want to cause a global thermal nuclear meltdown from all the ac that is blowing away in the the atmosphere. lol... I am hoping to block the rear ac line off completely, but I am concerned about what happens to the compressor oil after I do so. Would the compressor oil be backing up in the line if I tied the line off half way back on the van? for say under the middle of the van? I want to insure that the compressor continues to get oil, and I am not sure where or how to block the line up front so that it can still circulate. I really need to get this fixed asap.. Any help or suggestions would be greatly appreciated.
Great video, thank u
Highly doubt it will give too cold if it's stuck open. If it's stuck open, the evaporator is flooded with liquid refrigerant and it actually expands inside the suction line rather than inside the evaporator. Keeping suction pressure (and evaporator temperature) up in the process. In fact, suddenly dropping the superheat once the evaporator becomes cold is a way to keep the evaporator from freezing up... Out of curiosity, was it really stuck closed or did it still allow some air to flow through (in theory, it should never close, in order to prevent oil pooling behind it when the rear blower fan is off, provided you don't have a solenoid valve to the rear evap)? PS By the way i have a pretty identical valve among my stuff i like to play with and that little metal strip you see at 20:42 inside the liquid entrance is part of a "cage" that is supposed to break bubbles when the TXV is fed with a "two-phase" refrigerant (especially happens when you're slightly off charge) and reduce flow noise... yes, i've disassembled the valve and looked inside it