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Is this harmful to my system?

abbouddi on Tue October 28, 2008 6:43 AM User is offline

Year: 2003
Make: Peugeot
Model: 307
Engine Size: 1600
Refrigerant Type: R134a
Ambient Temp: 35 C
Pressure Low: 32 psi
Pressure High: 200 psi
Country of Origin: Saudi Arabia

Hi, I just recharge my AC after changing a damaged AC pipe, the technician did vacuum, added some oil and recharged R134a. Now my AC is cooling well, but I am hearing some low noise from evaporator (something like boiling water). Is this harmful? and what are the causes of this? is this as I guess extra liquid freon in the system?

Thanks

Edited: Tue October 28, 2008 at 8:02 AM by abbouddi

TRB on Tue October 28, 2008 1:50 PM User is offlineView users profile

It this noise while the A/C is running or when you shut it off?

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JACK ADAMS on Tue October 28, 2008 4:10 PM User is offline

This can be the TXV metering refrigerant or and air bubble stuck in the heater/coolant system.

abbouddi on Wed October 29, 2008 1:14 AM User is offline

This noise is when AC is running.
sorry but what is TXV metering?
if this is air bubbles, does pulling a vacuum again will remove this?

thanks

Voyager97 on Wed October 29, 2008 8:27 AM User is offlineView users profile

Quote
Originally posted by: abbouddi
This noise is when AC is running.

sorry but what is TXV metering?

TXV = Thermal Expansion Valve. It regulates the amount of refrigerant passing into the evaporator, and lowers the pressure.

Quote
if this is air bubbles, does pulling a vacuum again will remove this?



thanks

No, The air bubbles will be in the engine cooling system, not the AC. If it is air in the coolant you will need to bleed the cooling system to remove it.



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Vic @ Pennine AutoChill

Chick on Wed October 29, 2008 5:36 PM User is offlineView users profile

If the bubbles are in the sight glass, I would have the system evacuated and recharged to factory spec. Some systems designed for R134a will clear the sight glass, so bubbles would mean a low charge, if the cooling system is bubbling you may have air in the cooling system, and the heater core is near the evaporator, but you would hear that all the time.. I doubt you use the heater much in Saudi though... Ask your AC tech to check the charge again, sometimes a low charge will cause hissing in the evaporator..Hope this helps..

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Chick
Email: Chick

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