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Kenlowe Thermostatic fan switch


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Gentlemen,

The thermo fan switch on my 4A has given up the ghost. Has anyone got one that they are willing to sell or, can anyone recommend a replacement for it.

Thanks

Graham

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What sort of switch is it?

Mine is in the metal down pipe between the water pump and the bottom of the radiator. Both the pipe (with a welded in boss) and the switches, with a variety of temperature options are available from the usual suspects. 

Rgds Ian

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This is the type of thing I use, it screws into a threaded boss welded to the steel pipe in the bottom hose run.

All the usual suspects sell them (the switch & the pipe)

Bob.

https://www.ebay.co.uk/itm/253043650850?hash=item3aea93b122:g:fwEAAOSwnkpa5z7W

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Although it may seem useful to be able to adjust the thermostat's setting with a knob, such as shown in Peter's photo, I found that the original Kenlowe arrangement was fine when first fitted, but after the top hose had been removed and re-fitted a number of times, coolant started to weep from the joint.

For this reason, I prefer the screw-in type of thermostatic switch, mounted in a threaded boss in the return pipe from the bottom of the radiator to the pump.

There is one disadvantage: one may need to try a couple of switches in order to achieve the required setting, but thereafter it is fit and forget. 

I note that the Otter switch has 98-93 degree setting, which I guess is ON/OFF - that might be somewhat high for a TR if fitted in the return pipe.  Moss has a number of switches, with 82, 86, 88 and 92 settings (I take this to be the ON in each case).  I cannot recall the setting of the switch installed in my car, and I don't intend to take it out!

Ian Cornish

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I found the Kenlowe adjustable controller was a failure and I believe it is because it is exposed to too much heat located in the water pipe.

After it failed I fitted a Mishimoto adjustable fan controller where only the sender unit is in the radiator hose, I did find an adapter that fitted into the hose with a threaded hole for the sender.

Mishimoto Adjustable Fan Controller Kit.webloc

Graham

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  • 2 months later...
On 9/24/2021 at 10:53 AM, Andy Moltu said:

I have obtained a list of the different Intermotor fan switches that fit a 22mm boss with their temp ranges - will post when I get home.

Hi Andy

Did you ever post the details for different intermotor fan switches and their temperature ranges as I am keen to fit one on my TR3.

 

Many thanks

Adrian

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This list seems to work Adrian, all of them have 22mm threads but what it doesn't tell you is the connector type. Some of them have flying leads or special plugs.  You have to google each part number (e.g. "intermotor 50110" ) to get a full description :

For instance the 50110  turns on at 92C and off at 82C, and has spade terminals. 

Part No, A/F Size, Thread, Temp °C ON-OFF

50100 29 M22 x 1.5 82-68 
50250 29 M22 x 1.5 86-76 
50012 29 M22 x 1.5 86-77 
50090 29 M22 x 1.5 86-81 
50120 29 M22 x 1.5 88-79 
50295 29 M22 x 1.5 88-79 
50271 29 M22 x 1.5 88-83 
50272 29 M22 x 1.5 88-83 
50275 29 M22 x 1.5 88-83 
50240 29 M22 x 1.5 90-80 
50110 29 M22 x 1.5 92-82 
50111 29 M22 x 1.5 92-82 
50112 29 M22 x 1.5 92-82 
50170 29 M22 x 1.5 92-87 
50200 29 M22 x 1.5 92-87 
50210 29 M22 x 1.5 92-87 
50211 29 M22 x 1.5 92-87 
50220 29 M22 x 1.5 92-87 
50230 29 M22 x 1.5 92-87 
50231 29 M22 x 1.5 92-87 
50235 29 M22 x 1.5 92-87 
50260 29 M22 x 1.5 92-87 
50270 29 M22 x 1.5 92-87 
50280 29 M22 x 1.5 92-87 
50281 29 M22 x 1.5 92-87 
50285 29 M22 x 1.5 92-87 
50290 29 M22 x 1.5 92-87 

50011 29 M22 x 1.5 93-88 
50130 29 M22 x 1.5 95-86 
50030 29 M22 x 1.5 95-90 
50033 29 M22 x 1.5 95-90 
50061 29 M22 x 1.5 95-90 
50062 29 M22 x 1.5 95-90 
50160 29 M22 x 1.5 95-90 
50104 29 M22 x 1.5 97-92 
50282 29 M22 x 1.5 97-92 
50190 29 M22 x 1.5 100-95 
50195 29 M22 x 1.5 100-95 
50196 29 M22 x 1.5 100-95 
50197 29 M22 x 1.5 100-95 
50000 29 M22 x 1.5 103-98 
50013 29 M22 x 1.5 103-98 
50014 29 M22 x 1.5 103-98 
50191 29 M22 x 1.5 120-115 

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Looking through my very large file of invoices since 1990, I believe that I have an IM50090 thermostatic switch screwed into the metal pipe between the bottom of the radiator and the pump inlet. 

According to Moss, this switches at 86/81 (on/off) degrees, and it's been in there since 2000.

Ian Cornish

Edited by ianc
50090, not 50690
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FWIW the switch from a Renault 5 rad is ideal for a sidescreen car. (Thats the things you find out when cross referencing these things!)

Stuart.

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