Zoeller M53 Switch Failure

Tubing to pressure switch plugged.

Zoeller m53 switch failure.

Float switch tether length too short check valve stuck open or none installed in long distance line overload open bidding sump pit too small. Model 53 sump effluent or dewatering pumps fm2958 0720 supersedes. The switch would get stuck in the high position. That said a supply house near me carries little giant chinese made zoeller and hydromatic copies and claims that their m53 copy has a better seal around the float arm.

With the higher cost the m98 provides a higher flow rate of 72 gallons of water per hour thanks to the 1 2 hp motor compared to 43 gph and 1 3 hp on the m53. While the rest of the machine is built to withstand virtually any kind of punishment you can think to throw its way the float switch tends to flame out relatively quickly. Zoeller pumps are quite good sturdy and quiet but unfortunately have many well known switch issues. The biggest issue consumers have with the zoeller m53 mighty mate submersible sump pump 1 3 hp is its float switch.

The constant expansion and contraction of the rubber in the grommet around the float arm causes it to wear faster and once you get water in the switch housing it s going to fail. The m98 is more expensive than the m53 but both are affordable on any household budget less than 200. Clean or replace if plugged. Replace switch if defective.

M53 sump pump repair cap and switch assembly 004702 zoeller switch part no 004892 with ur zone screws 4 stainless steel cap mounting 5 0 out of 5 stars 1 68 97 68. Pump will not shut off debris under float assembly float bound by basin sides or other switch damaged or out of adjustment. When no water is delivered check prime of pump and well piping. Purchased this replacement kit for my zoeller m53.

Short demo showing replacing the float switch on a zoeller sump pump. While both sump pumps are made by zoeller there are a few key differences that set them apart. Remove tubing and blow through it. Arcing may have caused switch contacts to weld together in closed position.