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Cold and hot

wally on Wed August 27, 2014 9:16 PM User is offlineView users profile

Year: 03
Make: honda
Model: crv
Engine Size: 2.4 lite
Refrigerant Type: r134

Hi, I have an 03 crv. Just replaced the compressor, and drier. Had it professionally charged yesterday. It now blows cold at idle and low rpm. Blows hot at higher rpm. I can hear the compressor clicking off at the higher rpms. Then it kinda seems to click on and back off. I let it go back to idle and sometimes it kicks back on and gets cold, and sometimes I have to turn the switch off for a couple seconds and turn it back on.
What could be causing this?

HECAT on Wed August 27, 2014 9:25 PM User is offline

Could be low pressure or high pressure safety devices functioning as they should. What are the pressures? Why was the compressor replaced?

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wally on Wed August 27, 2014 9:44 PM User is offlineView users profile

I don't have gauges to check pressure. I could go back to the shop I had it charged at and check I guess. Compressor was replaced due to bad clutch bearing, bad shaft bearing, bad coil. Took it apart and there was no metal or shavings or anything.

HECAT on Thu August 28, 2014 7:24 AM User is offline

If you cannot test the system we are not going to be able to offer much assistance. IMHO, If you installed the new compressor and went to a pro to have it charged, they may have assumed no responsibility for the system and just charged it as you requested. They may have not performed any vacuum decay (leak testing) or performance evaluation of the pressures. (i.e. just charge it and ship it). You may have a leak and it is already dropping on the low side and hitting the cutout. Just speculating. I would recommend the original or another Pro assist you further.

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HECAT: www.hecatinc.com You support the Forum when you consider www.ackits.com for your a/c parts.

FLUSHING TECHNICAL PAPER vs2.pdf 

mk378 on Thu August 28, 2014 10:18 AM User is offline

Was oil added? Too much oil is bad.

By "high rpm" do you mean the car is moving at highway speed? If the fans don't work the condenser can overheat and raise the pressure, but this will not happen with the car moving at speed.

Dougflas on Thu August 28, 2014 1:56 PM User is offline

could also be low on charge thus causing a freeze up or too frequent cycling. Need pressures and temps.

wally on Thu August 28, 2014 1:59 PM User is offlineView users profile

I'll check in with the mechanic today or tomorrow. The condenser fan kicks on, and by high rpm, it's really not even that high, like 3500, and it happens while driving or just revving in neutral in my driveway. Strange thing, we went out last night and it worked fine. Maybe a 15 degree difference in the outside temp from earlier in the day. And yes, 5.3 oz of oil.
Thanks for taking the time....

HECAT on Thu August 28, 2014 8:20 PM User is offline

When a system is shut down much/most of the oil that is not in the compressor will reside in the evap. The liquid side thru the condenser is usually moving the discharged oil quickly with the liquid until the evaporation occurs in the evap and oil separation also occurs. Now there needs to be enough oil pooled in the evap to "glide" with gas to produce enough lube return to the compressor.

A quick data check (not verified) says your system needs 4.5 ounces full load of oil. If you did not flush, and added 5.3 ounces, plus what was in the new compressor (even if drained); you may have oil logged heat exchangers causing your symptoms. Again just speculating.

-------------------------



HECAT: www.hecatinc.com You support the Forum when you consider www.ackits.com for your a/c parts.

FLUSHING TECHNICAL PAPER vs2.pdf 

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