Vicleonardo1

Am I caught in a Behr trap?

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(edited)

It looks like there is some issue with my blower switch on my Behr AC. My AC is going through a complete overhaul with parallel condenser, sanden compressor, hobie dave bracket etc. Apparently my blower switch has croaked. I have posted on WTB looking for a replacement. 

Beginning to think I may be up the creek. 

So, without having to scrap my overhaul which included a heater box refurb etc. 

What the hell do I do If I cannot find that goofball 4 terminal switch? 

 

Would it be possible for one of you electrically inclined individuals to create a new one? (via some electrical supply company)   It would be a help for all the other Behr owners to at least have a viable option if theirs gives out. 

 

Any help or ideas would be greatly appreciated. 

 

Cheers!

 

Vic

Edited by Vicleonardo1

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(edited)

I have a four wire switch from a 74 e9, earlier switches had three wires and a separate changeover relay which bypassed the heater blower.  In 74 this feature was incorporated into the switch itself.  I’ve never seen one with soldered wires, they had a black plastic plug for the harness.  The threaded neck will be a bit longer I believe, e9s were long and e3s were shorter.  I don’t know how good the rheostat works but it works on full speed.  One of the issues with these is the thread pitch which is extra-fine and not all rings will work.  (One of the pins is a mounting pin only). Shoot me a PM.

 

Chris

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Edited by HBChris
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(edited)

Any luck with Vintage Air, or any great old A/C specialist — to find a generic replacement? These were not high-tech units. What separated the Behr’s electricals from the Frigiking’s and Clardy’s were that the Behr would not work while the heater blower was on. Maybe you just jettison that feature and use a three-wire switch.

 

Regards,

 

Steve

 

Edited by Conserv

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Ok so I am going through the same process, I don't know if my switch is good.  But I wanted a backup, so I went on ebay and got this.  I have hooked it up and it works great on the fan.  If I need it I will just use a push button switch to turn on the A/C.   Somebody will be able to tell you how the original one works. There is a resistor mounted in the case, that is all I know.  I also got a 12V temp gauge for the condenser, because I am pretty sure my temp controller is toast. 

 

Regards

 

 

 

image.thumb.png.f870ef4a0e69ff8c5ded0b69e79dd727.png

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(edited)

I have two Behr switches.  One has four posts, the other has 5 posts.  You can have either one for the price of postage.  PM me.

 

I use a PWM switch bought on-line.  The PWM switch only turns on and controls the speed of the fan.  I had to install a separate switch linking the compressor and the thermostatic switch controlling the temperature.  The Behr switch does all that in one.

 

https://www.amazon.com/gp/product/B01HEXJUX8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

 

IMG_4016.JPG

Edited by Tsingtao_1903
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Perhaps this guy can rebuild yours:

 

http://www.oddparts.net/exotic-switch-repair.html

 

 

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(edited)

If you can’t find another switch, you can probably repair it yourself...what exactly is wrong with it?  Did you take a multimeter and check to see if the switch is working (to weed out an electrical problem elsewhere)?  The biggest issue I’ve seen with these is corrosion from the system not being used...usually the a/c will run out of Freon for whatever reason and then the system never gets used again, so these switches never get turned and corrosion builds up and they don’t work right.  Try cleaning the switch with electrical cleaner or drill out the four rivets and dismantle the switch, cleaning or renewing any damaged parts.  The switch is a basic rheostat so you can use parts from another rheostat to fix it.

Edited by Brandon

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Yeah I also think a generic blower switch should be able to made to work with alittle look through the wiring diagram. These are not complicated, just basic resistance circuits.

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I know I am late to the disussion, but I find I need a BEHR fan blower switch for a 1976 2002. My system works great but I need a switch. Any update on the solutions you suggested?

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