Re: Toyota pickup AC questions
Posted: Sat Sep 15, 2018 11:26 am
Sorry...accidentally hit submit before cleaning up my previous post. Buttons on my phone are just too small.
A forum to discuess Automotive AC topics
JohnHere wrote:Do you know for sure that it was low on refrigerant? I ask because it's not possible to tell how much is in it by pressures alone. Recovering the charge and weighing it is the only way to gauge the actual amount.
After vacuuming the system, I simply added a very small amount of this stuff (less than 1/4 of the bottle) to the yellow charge line on the gauges before charging. Afterwards, I was able to see the UV dye circulating through the system via the sight glass on the R/D. This will help me better track the suspected leak next time it leaks (assuming that it is..)JohnHere wrote:Vacuum and refrigerant amount look good, but what do you mean about adding dye to the fill line? A half-ounce or so of dye is all that's needed.
JohnHere wrote:Elevated high-side pressures usually indicate a condensing problem caused by insufficient airflow. With the engine warm at fast idle, the A/C on, and an ambient in the 80's, I would expect the fan to be roaring most of the time. Even if it's new, the fan clutch could still be out of spec. Something to consider. After the fan re-engaged, the pressures dropped to 35/200, which are just about right for a conversion like this. At those pressures, I would expect to see center vent temps of 45-50 degrees. Does the vent temp drop into this range at speed or does it still hover around 60 degrees? If so, and air from the heater core isn't leaking in, the evaporator might not be sealed enough around its edges, allowing ambient air to infiltrate.