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Pressure switch issue? or something else...

18027 Views 8 Replies 4 Participants Last post by  Plumber101

We recently had a plumber out to check why our well pump would short cycle and would run even though there was no water use. We have a 1/3 hp 115v 2-wire submersible pump (according to the control box) with a 110ft well. We have no other information for the pump without pulling it. The house was built in 1966 and everything is original, never been replaced.

The plumber said it was the control box (capacitor and relay were bad), pressure tank (waterlogged), and pressure switch (not really sure), among other pieces/parts. I thought everything was fine until the pump would trip the circuit breaker (15A) when there was a large demand for it to run (laundry, shower, etc.) Every other demand was fine. The new tank is a Well-X-Trol 202-XL with a precharge of 38 psig. The control box is a Franklin 115v 1/2hp #2801044915 and the pressure switch is a Square D 9013 FSG-2, 40 on/60 off

They told us the pump itself is bad and "pushed" (to say it mildly) to come out and replace it for their "special" price. I have heard after he came out about some issues with other customers in the past.

It seemed a bit fishy the way they were doing things, so I decided to do some research myself and found that the pressure switch he installed was different (originally a 30/50 of the same type) and the settings were way off. He had it set 22 on (if the breaker doesn't trip), 40 off with this switch. The control box originally was a Franklin 1/3hp 115v 8.9A #2801020103. The original tank was unknown, it was corroded beyond recognition.

Would any of these issues cause a breaker to trip? I didn't have access to an amp meter, but I was planning to pull the pump and replace it myself this weekend if it is needed, but wanted to cover all other possibilities before I go for it.

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Going from 20/40 to 40/60 is what is probably causing the tripping with a pump that old. The pressure had probably been turned down to keep it going a little longer.
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