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Hello everyone,
I am having some issues with my A/C. It does not work at low speeds. On the high way it works reasonably well, though it is not super cold. I inspected the condenser fan relay and fuse and both were fine. Upon inspecting the condenser and fan assembly, I noticed that the condenser was bent and the fan was seized. About 10 years ago I rear ended someone. I guess the people who did the repairs did not address the AC :blink:
I am pretty certain that this is the main cause of my issues. The compressor seems to work
[video]https://www.youtube.com/watch?v=jxpxHbB5TS0[/video]What are your opinions on this issue? Do you think I will be able to get buy with replacing the fan and condenser? If so would the process look something like this:
– Reclaim refrigerant
-Remove old condenser and fan
-Install new condenser and fan
-recharge systemThanks in advance for your input!
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Im wundering if it is on the inside of your dash… like your vent dampinor or cab fan… could also be your ac cluch or pully getting stiff at higher rpm could be making it looser
I would just check your alternatopr and battory just incase it is causing voltage drops… auto parts store uselly do it free just bring your car in the day light and have them check itseam very odd that the condenser would be an issue because if that was bad they uselly would have a leak… you can chekc your freon level and see if that is an issue
[quote=”jakeh” post=171078]Hello everyone,
I am having some issues with my A/C. It does not work at low speeds. On the high way it works reasonably well, though it is not super cold. I inspected the condenser fan relay and fuse and both were fine. Upon inspecting the condenser and fan assembly, I noticed that the condenser was bent and the fan was seized. About 10 years ago I rear ended someone. I guess the people who did the repairs did not address the AC :blink:
I am pretty certain that this is the main cause of my issues. The compressor seems to work
[video]https://www.youtube.com/watch?v=jxpxHbB5TS0[/video]What are your opinions on this issue? Do you think I will be able to get buy with replacing the fan and condenser? If so would the process look something like this:
– Reclaim refrigerant
-Remove old condenser and fan
-Install new condenser and fan
-recharge systemThanks in advance for your input![/quote]
You mentioned that the fan was seized is this due to the shape of the condenser? is so try going to lowes or home depot, getting a bolt that is longer but with the same thread size and getting some spacers to get the fan away from the condenser. You said that for ten years this has been going on and the ac just now started acting up well I am willing to bet you are just a little low on Freon. take care of that second. if you find a leak you will have to empty the system might as well do the repairs then.Sorry, I was not clear. My AC has not worked properly at low speeds for years. I just dealt with it due to not having the funds to get it fixed. It was not until recently that I started investigating the issue and looking for a solution.
If it where me I would jump the connector for the fan and make sure its ceased. I have had success in the past with bending those condensers back out…just take your time and if its not leaking I would not replace it. Just replace the fan if its bad and call it a day.
You have the general idea of it, but the steps are actually ideally:
Recover refrigerant
Break slight vacuum with dry inert gas (Nitrogen)
Remove old parts
Plug lines
See if any oil is in the old condenser and receiver drier
Install new parts, adding oil as necessary when connecting them
Pressurize with dry inert gas to check for leaks
If no leaks under pressure then release pressure and connect vacuum pump and micron gauge
Vacuum to <500 microns then isolate system and make sure vacuum doesn't rise above 1000 microns. If the vacuum steadily rises you have a leak under vacuum, if it rises in jumps and then stabilizes you have moisture in the system. This will require a good 2 stage pump with fresh oil, a single stage probably won't work and an air operated venturi vacuum pump won't even make the micron gauge give a reading
If all OK then disconnect vacuum pump and connect refrigerant source on charging scale, but beware if using a standard 2 valve manifold with a single center port that you will have trapped air in the center, so preferably use a 4 valve manifold or a 2 valve with a tee center port and pull a vacuum on the hose to the refrigerant cylinder as well, using a valve in the hose to the vacuum pump or if it has one the valve in the pump itself. Make sure the manifold you use has the thumb screw core depressors on the quick connect fittings
Zero charging scale
Crack open cylinder valve long enough to break vacuum to just above atmospheric with refrigerant then disconnect vacuum pump
Note reading on scale, invert refrigerant cylinder to draw liquid and fully open cylinder valve
Zero scale again
Charge liquid only into the high side of the system stopping if the required system weight is reached, if not and the pressure equalizes first close the high side valve
Note reading on scale again and add to first reading, flip cylinder back upright for vapor, then zero scale again
Start engine, set controls for blower on highest speed and coldest temp
Slowly charge vapor into suction/low side to add remaining required amount of refrigerant
Monitor system for proper operation
Close refrigerant cylinder valve and high side thumb screw, but leave hoses connected
Slowly open both valves on manifold and let system operate for a few minutes to purge liquid trapped in high side hose back into the system
Set blower to low speed
When low side pressure is as low as possible close low side thumb screw then manifold valves then disconnect all hoses, at this point you should have A/C that works better than it has in quite some time.
Some notes:
134a refrigerant is not a Freon, DuPont calls it Suva.
Definitions, recover is to remove the refrigerant from the system and put it in a cylinder. Recycle is to use a self contained machine to purify the refrigerant as much as possible, IE remove any oil, moisture, acids, air, Etc. Reclaim is when a certified lab does the recycling but has the test gear to certify that the refrigerant is as pure as it was when it was new/virgin.
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