115 volt Cooler Control & Thermostat Retrofit Kit For Mastercool Plus or Contractors Series

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Product Overview

For 115 volt application.

This kit can be used to replace the interior control box and thermostat combination on the Mastercool Plus or Mastercool Contractor's Series Cooler, some of which are now obsolete, including #P225101A, P225102A, P218301A, P218601A.
This kit consists of a new control box to be mounted on the outside of the cooler, a new plug receptacle box with wire leads for the inside of the cooler, a new 115 volt motor cord, and a new digital thermostat for inside the house. Requires rewiring of new plug receptacle box to new control box. Disconnect all power before attempting. Read all directions. Level of difficulty:medium.

You can read the control box and thermostat owner's/installation manual here.

Wiring schematic for 115 volt

To maintain use of purge pump feature with standard pump, we recommend purchasing also an additional pump receptacle to tie in to the new control box.
115 volt pump receptacle.

New cooler control is Dial part #7624. Features include:
Digital Evaporative Cooler Control with Thermostat
2 Speed 1/3 to 1 HP 115V/230V
Automatic start and stop for temperature comfort.
Automatically pad pre-wet.
Automatically adjusts from High to Low speed
Digital display with separate controller in water proof box.
Optional 2 / 4 / 8 hour timer.
Optional dump feature. (Use an extra standard cooler pump for timed water purge, like a Clean Machine.)
Motor rated 1HP @ 115V, 2HP @ 230V
Pump rated 2A @ 115VAC and 1A @ 230VAC
UL listed.

Replaces P225101A, RK301A


(12 reviews) Write a Review

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  • 2
    115 volt cooler control & T-stat

    Posted by Adrian Jewell on Jul 20th 2021

    Worked fine for two days, then would not start cooler, showed a E03 error, which is jumper wire, wired incorrectly. Jumper wire is wired for 115 volt, now have to run control through diagnostic test, then hope it will start cooler without E03 error.

  • 5
    Life Saver

    Posted by Josue Caban on Jul 13th 2021

    On eBay the original part can range from $259-689. Your price was so reasonable. There is an orange wire hanging and the manual did not explain what it was for. That is my only suggestion for correction. It works fine without it. Thanks for the retrofit solution.

  • 4
    Fixed my aging MasterCool unit

    Posted by JB on May 29th 2021

    Easy to install and allowed me to fix my aging AdobeAir cooler that the electronics went bad on. Otherwise, the cooler is still in decent shape so this saved me from having to replace the whole cooler.

  • 4
    New controller

    Posted by Neal R on Jun 19th 2020

    I just mounted it directly to the new cooler since it’s exterior now. My plugs didn’t have an extra drain outlet either but I only need that once a year. Thermostat is a little sensitive with it going between low and high a lot sometimes. Other than that works great. New thermostat is way nicer than old one.

  • 5

    Posted by Linda Pearce on Jun 10th 2020

    It’s working great. I purchased the control & thermostat kit last year That this one replaced. The one I purchased last year never worked right. This one works perfectly and was very easy to install. Delivery was very fast.

  • 5
    Awesome upgrade

    Posted by Migs on Jun 1st 2020

    I was able to follow the wiring diagram and called in for one question. I live in Colorado and I called around to see if anyone was familiar with the Adobe Mastercool systems. No luck. I took to the task myself and was able to figure it out. I have basic wiring knowledge. Ensured the breaker was off and went to work. Very nice unit, I think it saved me $3-3.5K by not having to replace the cooler. Thank you!

  • 5
    Could not find original replacement

    Posted by Mike on Aug 2nd 2019

    Replaced my original contractor series with this new system, installation was a breeze, chose to use the dump pump option , working great. Would highly recommend this replacement product.

  • 3
    I guess this is a "one size fits all" fix. my problem was there wasn't adequate room to install the box in the vertical position so I mounted it horizontally on the top of myHPC640E cooler, sealing the perimeter and hoping the cover is actually wate

    Posted by Lee Mac Millan on Jul 31st 2019

    Had to call the "Salesman" as I couldn't ascertain the unit was acceptable in the horizontal position-otherwise no hitches.

  • 5
    Cooler Kit

    Posted by John Quintana on Jul 25th 2019

    It all appears to work well. I installed it on July 24, 2019 and I appreciated your phone call to clear up a non existent problem