i have a 2007 honda accord with 3,0l v6 motor my ac is barely cooling until i add refrigerant once i add it and the car gets accelerated the compressor vents refrigerant and the ac starts blowing hot again and the compressor starts cycling again.
help pls i dont know whats wrong with the system
If the compressor is venting through the pressure safety valve you're probably adding too much refrigerant. Are you using a gauge set to monitor system pressures while adding refrigerant?
yes i am and im filling it to the specified amount
That would be with a full gauge set, not the cheap useless low-side gauge found on many recharge cans, correct?
The only way you can be sure you have the correct amount of refrigerant is to evacuate the system and charge in the correct amount by weight. This is particularly important if you have a variable-displacement compressor since those will keep pressures looking good over a wide range.
It's also possible you have a blockage in the system. Usually you can find that by feeling the hoses and pipes for a sudden difference in temperature which would be at the site of the blockage.
no not a full gauge set i have one of them ordered and plan to evacuate the system then and recharge by weight after pulling a vacuum on the system
thank you for your input ill wait till i have my gages to test it properly then
It would be a good idea to check for and fix any leaks before refilling the system. If you don't have an electronic leak detector available you can use UV dye. (Though you won't be able to detect an evaporator leak that way unless that component is accessible, which is not the case with most cars.)
I hope if you've been using one of those recharge kits with the low-side gauge that it doesn't have sealer in it. (Many do.) AC "sealers" can cause blockages, damage the compressor, and damage refrigerant recovery equipment. Several years ago a friend of mine found that out the hard way. Despite being warned he tried to use sealer to "fix" a leak. He wound up having to replace almost the entire AC system.
If the system vents refrigerant, you should be able to smell it. (It has a bit of a musty smell). You might have several leaks, from the relatively cheap and benign to the EVAP core. (Replacing the EVAP core is expensive because of the labor. The dash and just about everything behind it has to come out. It's a daunting job.
How to find out? The UV dye test is used to find leaks.
