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SPAL Thermoswitch Relay and Wiring Harness Kit

Specs
Sold in Quantity:
Kit
Thread Pitch:
3/8" NPT sender, 1/2" NPT bushing
Temp. Range:
-
Notes
Includes heavy duty relay with color-coded wires and a fuse holder.
SPAL Thermoswitch Relay and Wiring Harness Kit

Click image to enlarge

Details

Reviews (27)

Q & A (9)

What's in the Box

Info

This easy to use cooling fan relay kit includes a labeled wiring harness, 40 amp relay, fuse holder and coolant sensor. Available with 185° on/165° off or 195° on/175° off. Works great with the Spal Pulse-Width Fan Controller.

  • Relay wiring kits are a must-have when installing an electric fan
  • Designed to safely integrate with OEM wiring
  • Waterproof 40/50 Amp relay
  • Printed wires (for ease of installation)
  • 3/8" NPT (National Pipe Thread) stainless steel switch
  • Optional switched override capability
910-64028 Instructions (PDF)

Customer Reviews

Rated 4.7 out of 5 by 27 reviewers.
RATING BREAKDOWN
27 reviews
5 Stars
23
4 Stars
3
3 Stars
0
2 Stars
0
1 Star
1
RECOMMEND THIS PRODUCT:

Skwig
Verified Purchaser
Grass lake, mi

Works great!

April 12, 2016
Installed on a new Spal fan I had bought separately. Wired in easy, works great! Engine runs nice and cool.
Yes, I recommend this product.
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do not have one
Verified Purchaser
New castle PA

Works like it should

March 21, 2016
very easy to install, it is made fool proof. each wire is labeled where it goes. No issuxes so far
Yes, I recommend this product.
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t-bucket
Verified Purchaser
La Quinta, Ca.

Fan switch

December 20, 2015
nice way to have an automatic fan switch installed. Easy to install.
Pros:
  • Easy'
  • Convenient
  • Quick
Yes, I recommend this product.
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none
Verified Purchaser
Mechanicsville, VA

"Can't wait to start the engine and se if this works!"

December 20, 2015
Seems to be easy to install but instructions were to brief. Put it on my rebuilt engine that hasn't been started yet, wiring is as the instructions showed me but I'll have to wait for the engine to be started to really judge this product.
Pros:
  • Everything Came In One Bo
Cons:
  • Didn't Find Any
Yes, I recommend this product.
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Five-O
Verified Purchaser
Verified Reviewer
Gig Harbor, WA

Good quality kit

October 14, 2015
This is a plug and play if you have a SPAL fan as I do. High quality material and a complete kit. All parts fit well. I have not fired the motor yet to see how it works so can't speak to that yet.
Yes, I recommend this product.
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mouse
Verified Purchaser
Verified Reviewer
bunker hill, wv.

excelent product and easy to install!

September 14, 2015
great product with detailed instructions! I highly recommend this product!
Yes, I recommend this product.
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arielhmm
Verified Purchaser
El Paso, TX, USA

Great Thermoswitch

April 06, 2015
This is a real Heavy Duty Thermoswitch, very good gauge on wiring, I high recommended to electric fan conversion.
Yes, I recommend this product.
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Olddude1959
Verified Purchaser
Champaign, IL, USA

Easy to install and does what I needed i

October 27, 2014
Bought this for my '32 hi boy, easy to install and pretty inconspicuous appearance.
Pros:
  • easy installaton
  • Affordable
Yes, I recommend this product.
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a1DTE
Verified Purchaser
California

Very complete, I did have to call them t

August 14, 2014
Great product, I did need to call for help installing, but they were very helpful.
Yes, I recommend this product.
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m1911a1
Verified Purchaser
Osseo, MN, USA

easy to do

July 29, 2014
good instructions, works as advertised, only took about a half hour to install.
Yes, I recommend this product.
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Page 1 of 3

Product Q&A

9 questions : 16 answers

1 answers

Will this work on a dual fan setup?

rudifus1
December 06, 2014

Will this work on a dual fan setup?

Answers

December 08, 2014
EricM
For dual fans you need one relay per fan. A second relay such as 91064044 would be required.
1 answers

What temp. switch would I use on my A/C condenser fan? 29 Ford sedan, 350 V-8. A/C condenser fan is under chassis just in front of differential, at a 30 degree angle with a fan mounted on it. I expect tot use another to turn on the electric fan on the engine. What temp do I need there? 195 degree? Thanks, dave

kopq
central Nh
January 25, 2014

What temp. switch would I use on my A/C condenser fan? 29 Ford sedan, 350 V-8. A/C condenser fan is under chassis just in front of differential, at a 30 degree angle with a fan mounted on it. I expect tot use another to turn on the electric fan on the engine. What temp do I need there? 195 degree? Thanks, dave

Answers

January 27, 2014
EricM
On the temp senders to kick the fan on with AC fan a lot of times comes on with the turn on of the air. It is common to wire your electric fan so that it kicks on when the compressor is running. This would not require a temperature sender, you would just wire a fan relay into your existing AC wiring. On the engine fan it depends on what thermostat you are running. If you have a 195 thermostat there would be no need of the fan coming on before the hot coolant reaches the radiator and thus a 195 would be used. Some customers still use the 195 if they have a lower thermostat to allow the radiator to do some of the work before the fan kicks on. This way it lessens the run time of the fan.
1 answers

Will this kit work fine with a flexalite 123 cooling fan?

Joe13
USA
January 02, 2014

Will this kit work fine with a flexalite 123 cooling fan?

Answers

January 03, 2014
EricM
Yes this kit will work with your Flexalite fan. The fan connector is different between the Spal and Flexalite fans but you can easily crimp a different connector on the wiring in this kit.
2 answers

can I use this set on a 1935 Flathead motor I will install a Radiator Electric Cooling Fan on my 1935 Flathead motor. Is this kit good for me ?

Didier
France
September 24, 2013

can I use this set on a 1935 Flathead motor I will install a Radiator Electric Cooling Fan on my 1935 Flathead motor. Is this kit good for me ?

Answers

July 30, 2014
m1911a1
yes, use the largest spal fan that will fit your radiator
September 25, 2013
Jason
Spal kit number 91064028 has a choice of fan turn on at 185 or 195 and this makes the fan turn on once the coolant temperature in the engine gets to that temperature. Eliminates the need for a manual switch but the relay can be wired for over ride if so desired. The Sender will need to mount on the motor and depending on pipe thread size it comes in 3/8 and also with an adapter bushing.
3 answers

can the fuse holder be located further then 12 inches from the battery i would like to install under my dash on my23 t about 3 feet from my battery

tara
May 22, 2013

can the fuse holder be located further then 12 inches from the battery i would like to install under my dash on my23 t about 3 feet from my battery

Answers

July 30, 2014
m1911a1
no problem, be sure to use the same gauge wire as the wire on the fuse holder.
September 19, 2013
HarleyJake
should not be a problem
May 23, 2013
EricM
If you are using a lead under the dash for the power source such as the fuse box having the fuse by it should not be a problem. With T buckets commonly having the battery under the car or in the pickup bed the main lead commonly comes from the starter for the fuse box. If you have a Speedway or Painless wiring harness there is normally a fused lead for the fan.
2 answers

170° Thermostat = Which Part #? My truck has a 170° Thermostat. Does that mean I should get the kit that turns the fan (ON @ 185°)/(OFF @ 165°) or the kit that turns the fan (ON @ 195°)/(OFF @ 175°)?

jp2code
Longview, TX, USA
April 24, 2013

170° Thermostat = Which Part #? My truck has a 170° Thermostat. Does that mean I should get the kit that turns the fan (ON @ 185°)/(OFF @ 165°) or the kit that turns the fan (ON @ 195°)/(OFF @ 175°)?

Answers

September 19, 2013
HarleyJake
it all depends on how hot you want your motor to run and how efficient your cooling system actually works---if its a regular street engine and not that high of compression----I would recommend the higher setting sender
April 25, 2013
Jason
Part number 91064028 has options for fan turn on and off and with the 170 degree thermostat the hot coolant will enter the radiator at 170 and in many cases may cool the engine to this temperature without the fan running. If you get the on at 185 and off at 165 when the coolant got to 185 the fan would come on to assist and this is what would be recommended.
3 answers

Can I hook a temperature gauge to the sending unit also?

flatheadfan
Minnesota
April 21, 2013

Can I hook a temperature gauge to the sending unit also?

Answers

July 30, 2014
m1911a1
no the sending unit will only turn on/off the fan, put a temp sending unit in the head of you flathead.
September 19, 2013
HarleyJake
you need to go with a sendor in the engine--this will not give you a accurate reading of whats going on
April 22, 2013
Jason
On the Spal kit number 91064028 it includes a grounding style sender to trigger the relay and would not accommodate a gauge also. We do offer a fan control that will work with your temperature gauge under number 91064023 and with any fan a relay is recommended to take the current surge on start up.
2 answers

Will this wiring kit work with the dual fan set up from SPAL? I bought the dual fan set up from SPAL on here. and i dont see any info if this will work with the dual fan set up

sub4158
December 24, 2012

Will this wiring kit work with the dual fan set up from SPAL? I bought the dual fan set up from SPAL on here. and i dont see any info if this will work with the dual fan set up

Answers

September 19, 2013
HarleyJake
should work--its measuring temperature---its dosn't know how many fans is running
December 26, 2012
Jason
You can order just one kit for your dual fan plus a separate relay for the second fan. So each fan should have its own relay but can share the rest of the kit
1 answers

Can this kit be used on a 6volt fan and system

bub
stanwood wa.
November 06, 2015

Can this kit be used on a 6volt fan and system

Answers

November 11, 2015
Zach
Expert
Relays are amperage specific and a 12 volt relay will not function properly on 6 volt. We apologize we do not have a kit similar in 6 volt but do have a 6 volt relay under part number 91064104.
Page 1 of 1

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