AC Evaporator Thermostat Repair

1969XR7Vert · Mar 5, 2011

Hi Necessity, it's me the Cheapskate/Mother of Invention (aka Pot-Stirring Drama Queen :buck

checking in!

You might remember my thread (one of many) looking for parts, an AC Evaporator Thermostat:

http://www.mercurycougar.net/forums...-AC-Evaporator-Thermostat&p=458721#post458721

Well, I took it upon myself to take that little sucker out and apart this morning. Filed, sanded and then burnished the contacts and carefully reassembled, perfect! You just bend the two little tabs aside to take the cover off and then remove 3 screws, pop out the mechanism and one more screw for the lower contact.

If you are good with intricate little things and have a knack for figuring out how to take things apart (and putting them back together), you might attempt and be successful at this! It's just two contacts and a spring/lever thingie.

Cheers,

E-Bob

catman · Mar 5, 2011

<SPAN style="LINE-HEIGHT: 115%; FONT-SIZE: 12pt">Question, are you converting to R-134? <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com

The units installed from the factory have a fixed temperature setting for R-12 which means that if you convert to R-134 it may not work as well. (May not get as cold) The units that are sold now are adjustable which allows you to cycle the system quicker (more often) to get the most out of the R-134.<o

></o

>
You may want to ask the member from Classic Air to be sure.

<o

></o

>
R-12 can still be bought. If you stay with R-12 use mineral oil instead of the ester oil. Ester oil doesn't move the R-12 molecules throughout the system as well as the original mineral oil.

1969XR7Vert · Mar 5, 2011

Using R-12. I have recycling and service procedure certification for CFC-12, so can buy it. Just a note though, the originals are adjustable too, for cut-in and for cut-out so the same thing is possible that you have described.

AZCAT · Mar 5, 2011

1969XR7Vert said:
Hi Necessity, it's me the Cheapskate/Mother of Invention (aka Pot-Stirring Drama Queen :buck checking in!

Sorry, I had to...

1969XR7Vert · Mar 5, 2011

Joe,

WTF, over?

catman · Mar 6, 2011

1969XR7Vert said:
Using R-12. I have recycling and service procedure certification for CFC-12, so can buy it. Just a note though, the originals are adjustable too, for cut-in and for cut-out so the same thing is possible that you have described.

That's cool, (no pun intended) I was not aware adjustables were made in 69. Learn something new everyday. Out of curiosity could you post the Ford part number and or picture of yours?

Here's a picture of an original fixed temp and an adjustable purchased from Classic Air. The fixed temp was made by Ranco It has the Ford part number C7ZA-19618-C. Thanks.

AZCAT · Mar 6, 2011

1969XR7Vert said:
Joe,

WTF, over?

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w

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ontBreakConstrainedForcedTables/> <w

ontVertAlignInTxbx/> <w:Word11KerningPairs/> <w:CachedColBalance/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> <m:mathPr> <m:mathFont m:val="Cambria Math"/> <m:brkBin m:val="before"/> <m:brkBinSub m:val="--"/> <m:smallFrac m:val="off"/> <m:dispDef/> <m:lMargin m:val="0"/> <m:rMargin m:val="0"/> <m:defJc m:val="centerGroup"/> <m:wrapIndent m:val="1440"/> <m:intLim m:val="subSup"/> <m:naryLim m:val="undOvr"/> </m:mathPr></w:WordDocument> </xml><![endif]--> You are going to sit there and tell me you do not recognize the buddy train? :evil:

As they say, it's not a good joke if you have to explain it...

1969XR7Vert · Mar 6, 2011

catman said:
That's cool, (no pun intended) I was not aware adjustables were made in 69. Learn something new everyday. Out of curiosity could you post the Ford part number and or picture of yours?

Here's a picture of an original fixed temp and an adjustable purchased from Classic Air. The fixed temp was made by Ranco It has the Ford part number C7ZA-19618-C. Thanks.

Cat, Mine has the two adjustment screws like the lower of the two you in the picture you posted. It is made by Cutler-Hammer as I recall. Have no part number or picture as it is fixed and reinstalled.

1969XR7Vert · Mar 8, 2011

Cat,

Actually, looking at your picture again, same manufacturer as the adjustable unit you show, I see "C-H Eaton" on yours, guess Eaton bought Cutler-Hammer.

catman · Mar 8, 2011

1969XR7Vert said:
Cat,

Actually, looking at your picture again, same manufacturer as the adjustable unit you show, I see "C-H Eaton" on yours, guess Eaton bought Cutler-Hammer.

1969XR7Vert,
Will have to do some research. Could very well be true. On the other post MaqCats posted;

MagCats

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Re: 69-73 AC Evaporator Thermostat

There were at least 3 different versions for 69-70 alone. One Before February 25, 1969, One after Feb 25 and before October 4, 1969, then one after Oct 4, 1969. They might have Internal differences. Originals have these dates next to the Connecting Pins for verification.

http://stores.ebay.com/MagMustangs

I checked out his ebay store and he has one of the three different dated ones for sale <TABLE class=sp1 summary="Other item info" cellPadding=3><TBODY><TR><TD class=inf_lab vAlign=top width="1%" align=left>Item number:</TD><TD vAlign=top>150531966454</TD></TR></TBODY></TABLE>

Late1969-Early1970 Ford Mustang, Fastback, Coupe, Convertible, GT, Shelby, Mach 1, Grande, Mercury Cougar, Standard, XR7, Eliminator... For Cars Built After February 15, 1969 and Before October 4th, 1969... AIR CONDITIONING EVAPORATOR TEMPERATURE CONTROL DE-ICING SWITCH With Sensor Rod... This is an ORIGINAL FORD PART. Removed from an Early 1970 Mustang with A/C. Stamped [FOMOCO] C9ZA-19618-A 2-15-69 Cutler Hammer.. Has an Ink stamp of '3N57' . ... The Switch is in Excellent Condition. NO RUST..TESTED AND WORKS. The Switch looks Nice. Sensor Rod is Great . Electrical Connections are Nice.. Overall, a Great, Working Original A/C Switch.

<TABLE border=0 cellSpacing=0 cellPadding=0 width="100%"><TBODY><TR><TD colSpan=2>

</TD></TR><TR><TD class=ipics-cell><FORM method=post name=ssFrm action=http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?VISuperSize&item=150531966454 target=ssFrmWin><INPUT value=0 type=hidden name=ssr><INPUT value=0#http://i.ebayimg.com/20#!CFGtJ5QBmk~$(KGrHqIOKo8E0UePRT07BNUD5Q0p4!~~_14.JPG#!CFGtJ5QBmk~$(KGrHqIOKo8E0UePRT07BNUD5Q0p4!~~_12.JPG|1#http://i.ebayimg.com/09#!CFGtStQ!Wk~$(KGrHqEOKjEE0f2CblUFBNUD5kdHPw~~_14.JPG#!CFGtStQ!Wk~$(KGrHqEOKjEE0f2CblUFBNUD5kdHPw~~_12.JPG|2#http://i.ebayimg.com/15#!CFGtbhw!mk~$(KGrHqQOKokE0fwI--jjBNUD53ybEw~~_14.JPG#!CFGtbhw!mk~$(KGrHqQOKokE0fwI--jjBNUD53ybEw~~_12.JPG|3#http://i.ebayimg.com/08#!CFGtmDQEGk~$(KGrHqMOKp!E0UqF(K,iBNUD6ObsF!~~_14.JPG#!CFGtmDQEGk~$(KGrHqMOKp!E0UqF(K,iBNUD6ObsF!~~_12.JPG|4#http://i.ebayimg.com/18#!CFGtvnQBGk~$(KGrHqMOKpoE0U8DDwSGBNUD6jhH+w~~_14.JPG#!CFGtvnQBGk~$(KGrHqMOKpoE0U8DDwSGBNUD6jhH+w~~_12.JPG|5#http://i.ebayimg.com/03#!CFGtyZ!!Wk~$(KGrHqUOKjME0hhRUneSBNUD6p3GEw~~_14.JPG#!CFGtyZ!!Wk~$(KGrHqUOKjME0hhRUneSBNUD6p3GEw~~_12.JPG|6#http://i.ebayimg.com/08#!CFGt48wBGk~$(KGrHqQOKm8Ez39zRQDRBNUD645cbQ~~_14.JPG#!CFGt48wBGk~$(KGrHqQOKm8Ez39zRQDRBNUD645cbQ~~_12.JPG|7#http://i.ebayimg.com/14#!CFGt+!gBmk~$(KGrHqMOKowE0fm6Y-ZGBNUD7GmMc!~~_14.JPG#!CFGt+!gBmk~$(KGrHqMOKowE0fm6Y-ZGBNUD7GmMc!~~_12.JPG type=hidden name=iurls><INPUT value=7 type=hidden name=dtid><INPUT value=1 type=hidden name=vs><INPUT value=0 type=hidden name=sh><INPUT value="1969 1970 Mustang Mach1 Cougar Xr7 AC EVAPORATOR SWITCH" type=hidden name=title></FORM><TABLE border=0 cellSpacing=0 cellPadding=0><TBODY><TR><TD class=vs_w-a><CENTER>

</CENTER>

</TD></TR></TBODY></TABLE>

</TD></TR></TBODY></TABLE>

I see the two screws ( in, out) anyway there's an extra for you if you need it.

Art · Mar 8, 2011

Operates on the same principle as;

The Buster Brown clicker. (Those of you younger than 50 are probably saying WTF?)

1969XR7Vert · Mar 9, 2011

catman said:
1969XR7Vert,
Will have to do some research. Could very well be true. On the other post MaqCats posted;

MagCats

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Re: 69-73 AC Evaporator Thermostat

There were at least 3 different versions for 69-70 alone. One Before February 25, 1969, One after Feb 25 and before October 4, 1969, then one after Oct 4, 1969. They might have Internal differences. Originals have these dates next to the Connecting Pins for verification.

http://stores.ebay.com/MagMustangs

I checked out his ebay store and he has one of the three different dated ones for sale <TABLE class=sp1 summary="Other item info" cellPadding=3><TBODY><TR><TD class=inf_lab vAlign=top width="1%" align=left>Item number:</TD><TD vAlign=top>150531966454</TD></TR></TBODY></TABLE>

Late1969-Early1970 Ford Mustang, Fastback, Coupe, Convertible, GT, Shelby, Mach 1, Grande, Mercury Cougar, Standard, XR7, Eliminator... For Cars Built After February 15, 1969 and Before October 4th, 1969... AIR CONDITIONING EVAPORATOR TEMPERATURE CONTROL DE-ICING SWITCH With Sensor Rod... This is an ORIGINAL FORD PART. Removed from an Early 1970 Mustang with A/C. Stamped [FOMOCO] C9ZA-19618-A 2-15-69 Cutler Hammer.. Has an Ink stamp of '3N57' . ... The Switch is in Excellent Condition. NO RUST..TESTED AND WORKS. The Switch looks Nice. Sensor Rod is Great . Electrical Connections are Nice.. Overall, a Great, Working Original A/C Switch.

<TABLE border=0 cellSpacing=0 cellPadding=0 width="100%"><TBODY><TR><TD colSpan=2>

</TD></TR><TR><TD class=ipics-cell><FORM method=post name=ssFrm action=http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?VISuperSize&item=150531966454 target=ssFrmWin><INPUT value=0 type=hidden name=ssr><INPUT value=0#http://i.ebayimg.com/20#!CFGtJ5QBmk~$(KGrHqIOKo8E0UePRT07BNUD5Q0p4!~~_14.JPG#!CFGtJ5QBmk~$(KGrHqIOKo8E0UePRT07BNUD5Q0p4!~~_12.JPG|1#http://i.ebayimg.com/09#!CFGtStQ!Wk~$(KGrHqEOKjEE0f2CblUFBNUD5kdHPw~~_14.JPG#!CFGtStQ!Wk~$(KGrHqEOKjEE0f2CblUFBNUD5kdHPw~~_12.JPG|2#http://i.ebayimg.com/15#!CFGtbhw!mk~$(KGrHqQOKokE0fwI--jjBNUD53ybEw~~_14.JPG#!CFGtbhw!mk~$(KGrHqQOKokE0fwI--jjBNUD53ybEw~~_12.JPG|3#http://i.ebayimg.com/08#!CFGtmDQEGk~$(KGrHqMOKp!E0UqF(K,iBNUD6ObsF!~~_14.JPG#!CFGtmDQEGk~$(KGrHqMOKp!E0UqF(K,iBNUD6ObsF!~~_12.JPG|4#http://i.ebayimg.com/18#!CFGtvnQBGk~$(KGrHqMOKpoE0U8DDwSGBNUD6jhH+w~~_14.JPG#!CFGtvnQBGk~$(KGrHqMOKpoE0U8DDwSGBNUD6jhH+w~~_12.JPG|5#http://i.ebayimg.com/03#!CFGtyZ!!Wk~$(KGrHqUOKjME0hhRUneSBNUD6p3GEw~~_14.JPG#!CFGtyZ!!Wk~$(KGrHqUOKjME0hhRUneSBNUD6p3GEw~~_12.JPG|6#http://i.ebayimg.com/08#!CFGt48wBGk~$(KGrHqQOKm8Ez39zRQDRBNUD645cbQ~~_14.JPG#!CFGt48wBGk~$(KGrHqQOKm8Ez39zRQDRBNUD645cbQ~~_12.JPG|7#http://i.ebayimg.com/14#!CFGt+!gBmk~$(KGrHqMOKowE0fm6Y-ZGBNUD7GmMc!~~_14.JPG#!CFGt+!gBmk~$(KGrHqMOKowE0fm6Y-ZGBNUD7GmMc!~~_12.JPG type=hidden name=iurls><INPUT value=7 type=hidden name=dtid><INPUT value=1 type=hidden name=vs><INPUT value=0 type=hidden name=sh><INPUT value="1969 1970 Mustang Mach1 Cougar Xr7 AC EVAPORATOR SWITCH" type=hidden name=title></FORM><TABLE border=0 cellSpacing=0 cellPadding=0><TBODY><TR><TD class=vs_w-a><CENTER>

</CENTER>

</TD></TR></TBODY></TABLE>

</TD></TR></TBODY></TABLE>

I see the two screws ( in, out) anyway there's an extra for you if you need it.

That's the one I have. As for different parts for different build dates, I view all that with some scepticism.

catman · Mar 9, 2011

Art said:
Operates on the same principle as;
View attachment 24785
The Buster Brown clicker. (Those of you younger than 50 are probably saying WTF?)

Man did I get into alot of trouble with that! The nuns couldn't figure out what it was or who was doing it for over two weeks! When I finally got caught I swear they had a party!

Art · Mar 9, 2011

catman said:
Man did I get into alot of trouble with that! The nuns couldn't figure out what it was or who was doing it for over two weeks! When I finally got caught I swear they had a party!

I'll bet $.25 that like me, you remembered the clicker but not the shoes.

(Sorry for the sidetrack Bob..)
Eh, not really

catman · Mar 9, 2011

Art said:
I'll bet $.25 that like me, you remembered the clicker but not the shoes.

(Sorry for the sidetrack Bob..)
Eh, not really

Yeh I remember the shoes... I never had a pair of them though, I didn't like them because they had a picture of him and his dog inside of the shoes. We got our shoes at Thom McAn.

After the clicker capper I got tagged for the rest of that year as "Buster" or "Buster Brown". You owe me 25 cents but I'll flip you for it double or nothing.

1969XR7Vert · Mar 9, 2011

Art said:
I'll bet $.25 that like me, you remembered the clicker but not the shoes.

(Sorry for the sidetrack Bob..)
Eh, not really

LOL Art !

AC Evaporator Thermostat Repair

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