Electric Cooling Fan for Radiator


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By Rudder2fly - 16 Years Ago
I need the forum's advice on how to wire up this fan.The fan is a 16" THINline reversible "S". I have it mounted in front of the radiator. The unit came with a NXCEC relay 12V 20/30A #0 332 204 150. I would like for the fan to start as the water temp exceeds say 190+ degrees. I suppose the only way to get that would be to read the temp at the suction side of the pump? I tried wiring the relay from the temp sending unit on the head but what I got was fan on with ingnition swich on and off with switch off. Also the feed back from the relay was messing up my fuel guage and temp guage. Maybe someone may know of a better relay than the one that came with the fan? Thanks G.S.
By charliemccraney - 16 Years Ago
You will need a fan switch in order for that to work. The sender, in the back of the head, assuming it is for the original gauge, is not a switch. Jet and Hypertech come to mind. Some have set temperatures at which they turn on and off. Others are adjustable.

On the wiring, I’ll guess you should have a hot wire from a key hot source which runs to the low current side of the relay and then from the relay to the switch and a wire from the battery to the high current side of relay and then from the relay to the fan.



You probably have it wired correctly. You're just using the wrong type of part to switch the relay.
By pcmenten - 16 Years Ago
My 79 MGB has a pusher fan with a temperature switch. I see two in the Moss catalog, one is $15, the other is $50. I don't know what the difference would be without looking in a manual.
By rick55 - 16 Years Ago
I have a thermofan fitted to the front of my Cusso radiator.

Here in Oz the major supplier is Davies Craig. They will ship internationally.

They have a controller - Electronic Thermal Switch - Part No: 0402 which provides everything you need to get the unit operating. Their website is www.daviescraig.com.au

You need to use a sensing apparatus (Thermostat) similar to what is used in air conditioners. The advantage to this is that you can manually adjust the switching points infinitely from about 80deg to 212degrees.

The problem with the OEM system type heat sensors, whether they be for a light or a gauge, is that they offer no adjustment for your particular application.

These switches that Davies Craig sell will be similar to items in the states.

This site explains how to use the switches and should provide somewhere to start.

If you have someone who is an electronic whiz it is possible to get a kit from Radio Shack (Tandy's here in Oz) which will switch a relay from the variable voltage output from the temperature gauge senders of later model cars. These units need to have an electric temperature gauge fitted and working to operate.

By far the easiest are the units similar to the ones above. They are able to be placed in the top radiator hose or simply attached to the fins just below the top radiator tank.

I hope this gives you some insight in getting the unit working.

Regards

Rick
By Eddie Paskey - 16 Years Ago
Hi Paul;  Try Old Air Products. Fort Worth, Texas---  www.oldairproducts.com.  Hope This Helps!!  God Bless   Eddie
By yehaabill - 16 Years Ago
Rudder Y-Guy:       You might try TorqFlo #733647/226204 from Auto Zone or

                  Advance Auto. This comes with everything you need, plus the

                  turn-on/off is adjustable and its only $25-50 bucks, can't

                  remember exactly...........

                                                       Bill

By Rudder2fly - 16 Years Ago
Thank you to all who replied to my problem! I am proud to be a member of this fine group of FORD people!!!!!! Thanks G.S.
By simplyconnected - 16 Years Ago
Vic, wire the fan so it is independent from the key switch.  Any time the radiator gets hot, the fan will cool it, even if you walk away from your hot car in a parking lot:

Hope this helps.  - Dave