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Re: [GMCnet] Dash A/C recharge [message #88767 is a reply to message #88755]

Tue, 15 June 2010 21:38

roy1

Messages: 2126
Registered: July 2004
Location: Minden nevada

Karma:

Senior Member

You are correct if the suction pressure is too low you will freeze up the evaporator coil with any refrigerant be it car,truck, house commercial etc. Pressure relates to temperature
there are close similarities between 12,134 and Duracool. I believe 134 is a tad higher then 12 and Duracool may be a tad lower then 12. If you were to charge your system and the suction line were cold and the pressure were say 25 lbs. Another system could be 30 lbs under similar circumstances. Assuming both expansion valves were good most likely the system with the lower pressure is moving less air thru the coil and it is going to be colder. What you need to keep in mind is if you don't have enough refrigerant in the system the suction line will not be cold and sweaty that means the coil is not cooling to its full capability and the pressure is going to be low and yes it will start icing up. In the GMC there is a thermostat in the evaporator section that cycles the compressor off when the air gets too cold then re-energizes the clutch when the air warms a bit.
I took mine out and installed a remote bulb thermostat with the bulb clamped to the suction line and set it at 33 degrees this way it rarely cycles the compressor and still prevents freeze up.

Roy

Roy Keen Minden,NV 76 X Glenbrook

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[Message index]

		Dash A/C recharge By: MikeT on Sun, 13 June 2010 17:44
		Re: Dash A/C recharge By: Matt Colie on Sun, 13 June 2010 17:58
		Re: [GMCnet] Dash A/C recharge By: emerystora on Sun, 13 June 2010 18:08
		Re: [GMCnet] Dash A/C recharge By: MikeT on Sun, 13 June 2010 18:30
		Re: [GMCnet] Dash A/C recharge By: emerystora on Sun, 13 June 2010 18:41
		Re: [GMCnet] Dash A/C recharge By: MikeT on Sun, 13 June 2010 19:02
		Re: [GMCnet] Dash A/C recharge By: powerjon on Sun, 13 June 2010 21:38
		Re: [GMCnet] Dash A/C recharge By: MikeT on Mon, 14 June 2010 07:36
		Re: [GMCnet] Dash A/C recharge By: Matt Colie on Mon, 14 June 2010 08:55
		Re: [GMCnet] Dash A/C recharge By: Keith V on Mon, 14 June 2010 09:50
		Re: [GMCnet] Dash A/C recharge By: emerystora on Mon, 14 June 2010 11:02
		Re: [GMCnet] Dash A/C recharge By: Keith V on Mon, 14 June 2010 11:43
		Re: Dash A/C recharge By: JohnL455 on Sun, 13 June 2010 19:02
		Re: Dash A/C recharge By: rgf on Mon, 14 June 2010 22:14
		Re: Dash A/C recharge By: Ken Burton on Tue, 15 June 2010 02:36
		Re: Dash A/C recharge By: Rusty on Tue, 15 June 2010 09:16
		Re: Dash A/C recharge By: ggroth on Tue, 15 June 2010 12:15
		Re: Dash A/C recharge By: Bob de Kruyff on Tue, 15 June 2010 14:51
		Re: Dash A/C recharge By: roy1 on Tue, 15 June 2010 19:19
		Re: Dash A/C recharge By: ggroth on Wed, 16 June 2010 15:16
		Re: Dash A/C recharge By: Rusty on Tue, 15 June 2010 17:30
		Re: Dash A/C recharge By: Bob de Kruyff on Tue, 15 June 2010 19:28
		Re: Dash A/C recharge By: roy1 on Tue, 15 June 2010 20:09
		Re: [GMCnet] Dash A/C recharge By: ljdavick on Tue, 15 June 2010 20:11
		Re: [GMCnet] Dash A/C recharge By: roy1 on Tue, 15 June 2010 21:38
		Re: [GMCnet] Dash A/C recharge By: emerystora on Tue, 15 June 2010 21:56
		Re: [GMCnet] Dash A/C recharge By: roy1 on Wed, 16 June 2010 11:28
		Re: [GMCnet] Dash A/C recharge By: roy1 on Thu, 17 June 2010 22:06
		Re: [GMCnet] Dash A/C recharge By: emerystora on Tue, 15 June 2010 22:45
		Re: Dash A/C recharge By: Rusty on Wed, 16 June 2010 04:58

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