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Dash a/c [message #323677] Sat, 09 September 2017 21:05 Go to next message
Wayne is currently offline  Wayne   United States
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Registered: August 2004
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Type 2 a/c on 76 Birchaven.

Temperature switch in the front a/c box. Is the capillary tube supposed to touch the evaporator fins?

http://www.gmcmhphotos.com/photos/data/7085/medium/IMG_20170909_172629.jpg


http://www.gmcmhphotos.com/photos/data/7085/medium/IMG_20170909_172617.jpg


Wayne Lawrence
76 Birchaven
Bellflower CA
w-DOT-lawrence-AT-verizon-DOT-net
Re: Dash a/c [message #323687 is a reply to message #323677] Sun, 10 September 2017 07:12 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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Wayne wrote on Sat, 09 September 2017 22:05
Type 2 a/c on 76 Birchaven.
Temperature switch in the front a/c box. Is the capillary tube supposed to touch the evaporator fins?
<pictures snipped>

Wayne,

In other systems, that temperature control is supposed to prevent evaporator freeze-up. If that is the case here, it needs to be really close but touching should not matter.
Maybe someone else knows the GMC system better than I do.

Matt


Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
Re: [GMCnet] Dash a/c [message #323690 is a reply to message #323687] Sun, 10 September 2017 07:48 Go to previous message
emerystora is currently offline  emerystora   United States
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It doesn't matter about the tube touching but the bulb at the end of the tube should never touch. There is usually a clip of some kind to keep the bulb away, but close, to the fins. It is supposed to measure the air temperature not the fin temperature.

Emery Stora

> On Sep 10, 2017, at 7:12 AM, Matt Colie wrote:
>
> Wayne wrote on Sat, 09 September 2017 22:05
>> Type 2 a/c on 76 Birchaven.
>> Temperature switch in the front a/c box. Is the capillary tube supposed to touch the evaporator fins?
>>
>
> Wayne,
>
> In other systems, that temperature control is supposed to prevent evaporator freeze-up. If that is the case here, it needs to be really close but
> touching should not matter.
> Maybe someone else knows the GMC system better than I do.
>
> Matt
> --
> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Electronically Controlled Quiet Engine Cooling Fan
> OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
>
> _______________________________________________
> GMCnet mailing list
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