115V Digital Control and Thermostat Retrofit Kit for MasterCool Plus and Contractor’s Series

It arrived on time. This was a first for us to replace the old controller. Instructions were good and the installation went smoothly. It worked when we turned it on. It’s been working fine. I willl be buying another one soon.

Having been told by HVAC people that a replacement part(s) was either unavailable or prohibitively expensive for my 20 year old MasterCool evaporative/swamp cooler, followed by quotes ranging from $5,500 to $10,500 to replace it, I figured it was worth a couple of hundred dollars to give this kit a try. $250 paid to an electrician to install it and it has worked perfectly last summer and this one, all for less than 10% of the lowest cost I was given to replace my cooler.

When I first talked to the company to ascertain it would work on my cooler, i remember the person casually mentioning "you probably won't even need to change out your existing wall thermostat," so I didn't. After the install on first startup, no joy! I double checked all connections, still no good, called them again (good on the company for actually having a real live person to help out) and while he was helpful I was still clueless as to why it wouldn't work. I quit for the day, frustrated, then about 20 minutes later I had a brainfart and went out to the shop again and in about 5 minutes installed the new thermostat that came with the kit, and it worked!! THAT was the issue all along, I guess if I had not heard the earlier company rep mention replacing the "old" (3 years) digital thermo PROBABLY wouldn't be needed, I would have, as a matter of course, installed the new from the getgo. No matter, it's working great now, and just in time for 100 degree temps! Recommended. *From ICS* Hi Tom, glad to hear that it worked out in the end! I can tell you that all of us here would have told you as part of our rundown on this item that the thermostat would need to be replaced. We would very likely tell you that the thermostat WIRE could be re-used. Sorry for any confusion this may have caused. Thank you!

Quick service and delivery as well from knowledgeable people .

Provision for mounting a drain plug-in connection would be helpful.

The controller on my Master Cool CMC431A cooler recently failed & found that replacement parts are obsolete. I like that Dial makes a retrofit kit that works & allows continued use of the unit. That being said, there are improvements that could be made. The power recepticle box doesn't have a provision for the drain pump plug. I had to modify the box to accommodate the plug. The control unit is designed to be mounted on the outside of the cooler. We live in a mountain area with dry arid summers but cold snowy winters, requiring the unit to be covered. A box mounted on the outside of the unit is not practical. I wound up mounting the power receptical box near the front of the unit where the original control unit had been. I then had to splice all of the wiring & run it to the rear of the unit where I mounted the control box. Even if I would have mounted the control unit outside as shown in the instructions, I would still have had to splice in the wiring as what is provided wouldn't reach from the socket box to the control unit. Lastly, I don't like the fact that the thermostat does not have a button that allows manual draining of the unit like the original did. I have sent the original unit to a repair facility for refurbishing & plan to reinstall it upon its return.

My 20? year old Mastercool control board was getting erratic. This kit was just the ticket to restore full function and get set for another 20 years. It operates just as described and was straightforward to install. I used a 3/4" box extender to mount the enclosure to the outside of the cooler and pass the wiring to the interior plus one spacer and sheet metal screw thru tab for stability. Very pleased so far.

Perfect, just what I needed to get our evap cooler up and working again. There was a mix up in shipping and wrong item was originally shipped but a phone call solved it quickly and painlessly. Received the item shortly after the phone call. Easy to install. Highly recommend Indoor Comfort Supply.

Exactly what I needed and with online instructions that were great

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.