Blog · Red Deer & Central Alberta

Why Won’t My Well Pump Start? Electrical Causes and What to Check First

A well system is a pump down a hole, controls somewhere else, and a long buried circuit between them. Any of the three stops the water, and they look much alike from the kitchen tap. Working out which one failed before anyone pulls a pump is most of the job.

No water is not a problem you can leave until next week. It is also one of the few faults where the thing that failed and the thing you are looking at are usually in two different buildings.

A well system is a pump down a hole, a pressure tank and switch somewhere else, and a circuit running between them that may be two hundred feet long. Any of the three can stop the water, and they produce similar symptoms. Sorting out which one it is before anyone pulls a pump is the difference between a service call and a very expensive afternoon.

Three separate things, and only one of them is the pump

Before anything else, establish which of these you are dealing with:

Worth saying plainly: the pump is the most expensive of the three and the least likely to be the first thing wrong. It is also the only one that cannot be tested without pulling it. That order matters, because a pump gets condemned on a hunch more often than it fails.

What the symptom tells you

Nothing happens at all

No sound, no pressure change, nothing. Start with whether the circuit has power at all — a tripped breaker, an open disconnect, or a dead feeder out to the pump house. If other things in the same building are dead too, the problem is upstream of the pump entirely. If the circuit is live and nothing moves, attention goes to the pressure switch and, on a three-wire submersible, the control box.

The breaker trips

A breaker that trips on a pump is reporting something real. It may be the pump drawing more current than it should — a failing motor, a bound or sanded-up pump, a motor that cannot start. It may be a fault in the cable between the control and the pump, which on a submersible means the drop cable in the well. It may be a deteriorated connection heating up. Occasionally it is a worn breaker.

Resetting it once to see what happens is reasonable. Resetting it repeatedly is not: if the pump is drawing fault current, each reset puts that current through the motor and the cable again. The general reasons breakers trip are covered in why a breaker keeps tripping, and the motor-specific version in why a motor keeps tripping its overload.

The pump runs but you get no water or no pressure

Electrically, the system is working. That points at the mechanical side or the water itself — a worn pump, a dropped water level, a leak in the drop pipe, a failed check valve, or a waterlogged pressure tank. An electrician can confirm the pump is getting what it needs and running as it should, which is useful information, but the fix on this one is usually a pump or water-well contractor’s work.

The pump short-cycles

Starting and stopping every few seconds is hard on a motor and will eventually cost you one. The usual cause is a pressure tank that has lost its air charge, so the system reaches cut-out pressure almost immediately after cut-in. It can also be a pressure switch with a differential set too narrow, or a switch beginning to fail. Short-cycling is worth fixing promptly for the sake of the pump, not just the noise.

The pump runs and will not shut off

Either the system never reaches cut-out pressure — a leak, a failing pump, a stuck open valve — or the pressure switch is not opening. A switch with welded contacts will hold a pump on indefinitely, and a pump running against no demand does not last. If you can hear it running continuously, shutting the breaker off is the right move until someone looks at it.

The parts that fail most often

The pressure switch

A small mechanical device that carries the full pump current and operates every time the water is used. It is the hardest-working part of the system and a frequent failure point. Contacts pit, burn and eventually either weld closed or stop making contact. Symptoms range from a pump that will not start, to one that will not stop, to intermittent operation that comes and goes with no pattern.

It is also a live device in a damp location, which is why the cover stays on until someone with a meter is standing in front of it.

The control box, on three-wire submersibles

Three-wire submersible pumps use an above-ground box containing the start components. Those components fail, and when they do the pump typically hums, draws current and does not start, or trips its protection. Two-wire pumps have the start components built into the motor and no box, which means there is nothing to replace above ground — a distinction worth knowing before anyone goes looking for a box that was never there.

The wiring out to the well

On an acreage the pump is often a long way from the panel. Two things follow from that.

First, voltage drop. A pump at the end of an undersized run starts hard and runs hot, and the damage is cumulative rather than sudden. This is the same arithmetic that governs any long rural circuit — covered in getting power out to a new shop or outbuilding.

Second, the run itself is buried, decades old on many properties, and was installed by someone nobody can ask. Rodent damage, mechanical damage from later digging, water in a junction, and connections made underground without proper means all show up eventually. A circuit that works in dry weather and fails after a wet week is usually telling you about moisture reaching a connection.

The breaker and the disconnect

Both carry starting current repeatedly for years. A breaker that has tripped many times is weaker than it was, and will eventually trip at loads it used to hold. A disconnect in an unheated pump house takes weather, and its contacts show it.

What is safe to check before calling

All of this is done with nothing opened up:

What not to do: do not open the pressure switch cover, do not open the control box, and do not keep resetting a breaker that will not hold. The first two are live at full voltage in a damp place, and the third damages the thing you are trying to save.

Freeze-up season

Late October is the wrong time to find out the pump house heat has not worked since last winter. Two circuits on a rural water system do nothing for eleven months and matter enormously in the twelfth:

Both are worth confirming now rather than in January. A frozen line is a far worse day than a dead pump, and it frequently takes the pump with it. The rest of the seasonal list is in winter electrical prep for Central Alberta shops, farms and acreages.

Worth considering alongside it: a well pump means an outage takes your water with it. If that is a problem on your property, standby generator readiness covers what it takes to be ready for one.

What to have ready when you call

Frequently asked questions

Is this an electrician’s job or a well company’s job?

It depends on which of the three things failed, which is exactly the problem. Power, controls and wiring are electrical work. Pulling a pump, the drop pipe, the check valve and anything to do with the water itself is a water-well contractor’s work. Diagnosing which side of that line you are on first avoids paying the wrong trade to find out.

Can you tell whether the pump is bad without pulling it?

Electrical testing from above ground tells you a great deal — whether the motor and drop cable are within what they should read, whether the pump is drawing normal current, and whether the supply is adequate. That is usually enough to say with confidence whether the pump is the problem or whether it is something above ground. It is not the same as a mechanical inspection, but it very often prevents an unnecessary pull.

My water comes and goes. Is that electrical?

Frequently, yes. Intermittent operation points at a pressure switch, a loose or corroded connection, or moisture in a junction out at the well. Intermittent faults are also the ones that get misdiagnosed, because whatever was done last gets credit when the symptom happens to be absent.

The breaker holds but the pump hums and does not start.

A motor that hums without starting is getting power and cannot turn. On a three-wire pump that commonly points at the start components in the control box. It can also be a mechanically seized pump or a supply problem. It should not be left to keep trying — a motor stalled like that heats quickly.

Does a pump circuit need its own disconnect?

A means of disconnecting the pump is standard practice and generally required, and on a rural installation it is also simply practical — being able to isolate the pump at the pump house rather than walking back to the house matters when something is wrong. Specifics depend on the installation and are worth confirming against the current Canadian Electrical Code and your inspection authority.

Getting water back on

The useful first step is finding out which of the three things failed, and that is a measurement rather than a guess. Call 403-872-8698 or send the details through the service request form. The symptom, the gauge reading and roughly how far it is out to the well are the three things that move it forward fastest.

Related work is covered under electrical troubleshooting, agricultural electrical and panels and equipment power, with local detail on the farms and acreages and Red Deer County pages. What a diagnostic call typically involves is set out in what electrical troubleshooting costs.

Grasse Electric serves Red Deer, Red Deer County, Blackfalds, Sylvan Lake, Penhold, Springbrook, Innisfail, Lacombe, Ponoka and Morningside.

Written by Todd Grasse, Red Seal Journeyman Electrician, Grasse Electric — Red Deer, Alberta. Published October 22, 2026.

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