Dry pad I went up to check the MasterCool to make sure the belt was on properly, because it was making a small thump when it turned on. I turned the circuit breakers for pump and fan off at cooler box. Belt was fine. Didn't notice if the pad was wet or not, but it had been nice and cold just before I went up on the roof. Turned the circuit breakers on, came back downstairs and noticed about 4 hours later that I wasn't getting any cool air at all. What could I have done? (I did bring the pump in and try it in the sink and it worked fine.)

SOURCE: mastercool swamp cooler fan doesnt come on.

Are the relays perment on the board or are they seperate from the main board? If they are mounted to the board, you will need to replace the board. Sounds like you are getting a call to the relay but none leaving so this would indicate that you have a bad relay switch.

SOURCE: AC pad not fully getting saturated with water

1. Make sure the pump is getting plenty of water.

2. Make sure the pump is working.

3. Check the pvc pipe with drip holes are not plug. (above the pads )

4. Check the pads directional arrow that should be facing up. When pads are initially installed you can see arrows on the pads. The arrows should be in the up direction. That will allow the pads to get saturated more efficiently.

I hope these steps help you.

Jerry,

Ned C Cook

• 3433 Answers
• Posted on Jul 26, 2009

SOURCE: 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

SOURCE: I have a large 6500 unit on my roof. The pads

do you have the proper traping so that the air pressure do not stop the drainage. check your installation guide as per the traping of the condensate

SOURCE: Mastercool pump runs when themostat is off.

Check the compressor relay (in the outside unit) Most likely it's stuck.