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Mastercool chc641 NEED BEARING SIZE

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1 Answer

The capacitor in my Mastercool model MMB12 has rusted out and I can't identify the size. Is there a resource to help me?


i have been looking but haven't come up with anything sometimes on the motor itself tells you what capacitor is needed eg " 4uf " let me know if that is helpful

Aug 14, 2011 | Mastercool Portable Air Conditioner

1 Answer

I am a single woman trying to prepare my mastercool for winter. I don't know how to remove the pads, so if insructions could be sent, it would be greatly appreciated. I don't know the size of the cooler,...


Is it a side draft or downdraft cooler? My instructions simply say to cover the unit, disconnect the power and drain the water for winter. They don't suggest removing or cleaning the pads until spring. If you're ductwork also is connected to your furnace, and you don't have a cookie sheet(piece of sheet metal that fits in a slot beneath mastercool unit or along the inside if it's a side draft cooler) then besides covering the entire unit you cn probably cover the blower, also called the squirrel cage, with a canvas cover.

Oct 09, 2010 | Mastercool 67680 Evaporative Cooler Air...

1 Answer

I need an owners manual for my master cool. Can you help. Also, what size motor pulley is required for a 3/4 horse motor and a 1 horse motor?


Hello You need the SHAFT diamater size on the motor.And they have an ADJUSTABLE pulley to set.Bring the old one if possible.

Sep 15, 2010 | Mastercool 67680 Evaporative Cooler Air...

1 Answer

Do they make some kind of transition for the side discharge MasterCool MasterCool Evaporative Cooler, ASA71 So when I cut open the side of my house I have a way to vent it thur the wall. Is there a kit...


Best way is to get a sheetmetal shop inyour area to make one for you.. Give them the exact size of the opening and then tell them you want a 3/4" flange all the way around and make sure the duct connection is what you need.. Let us know if you need anything else.. please vote.

Sep 05, 2010 | Mastercool 67680 Evaporative Cooler Air...

1 Answer

I need some help knowing the pump I need


Since adobe air is out of business, you will have to make one of the dial 230 volt pumps fit in its place. I cut a little notch into the media support tray to fit mine.
As far as the pump size goes, the orange 230 volt is somewhere around 11'000cfm or bigger and works just fine in my precooler.

Aug 03, 2009 | Mastercool 67680 Evaporative Cooler Air...

1 Answer

Water pump size and over saturated pads


Louis, The cooling does not come from the volume of water running over the pads. It cools by cooling the air passing through the wet pads. So, Yours is an impeccably logical argument that leads to a false conclusion. Bigger is not better in this caThe fishy smell is from the matting (pads) when kept saturated, Molds and algae will form if there is too much water also.. Best you get the original size pump Good luck and stay cool - Ned

Jul 25, 2009 | Mastercool 67680 Evaporative Cooler Air...

1 Answer

The shaft on the master cool is moving from side to side and it vibrates. how do I stop it from moving


You need a couple of locking collars to keep the shaft from sliding around inside the bearing mounts.
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You'll have to take the pulley off and possibly the bearings to insert the locking collars in between key areas where the collars can keep the shaft from moving in and out. You'll need to know the size of the shat (probably 3/4") to know which collars to get. You can find them online at www.indoorcomfortsupply.com

You'll probably want some leather washers also to eliminate friction between metal parts.

Jul 03, 2009 | Mastercool 67680 Evaporative Cooler Air...

2 Answers

Loud rumbling noise in mastercool a/c


could be the fan is full off dust or something causing it to be out of balance

May 19, 2009 | Mastercool 67471 Evaporative Cooler Air...

1 Answer

Water pump not coming on


Does the pump turn by hand? Bearing seized up will stop the pump.

Open the bottom of the pump and spin the impellers if it wont spin just replace the water pump with one of correct size and voltage.

Is voltage getting to the pump motor? A bad switch can cause this.

Hope this helps please rate me as high as you can and thanks for using fix ya.

May 03, 2009 | Mastercool 67680 Evaporative Cooler Air...

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