GE Dishwasher C3 Error Code: Causes, Cost & Fix

What is the GE Dishwasher C3 error?#

C3 on a GE dishwasher is a pump pressure-switch error: the control is not getting the water-pressure confirmation it expects, so the wash cycle stalls — the dishwasher may fill but never spray, or hum without moving water. It is not hazardous, but it does stop the machine from cleaning. Before assuming the worst, check that the dishwasher is draining and that the filter is clear, since restricted flow is a common, simple cause.

C3 on a GE Dishwasher: likely causes and repair cost#

On a GE Dishwasher, the C3 code signals: pump pressure switch error.

Typical professional repair: $200–$450 · Difficulty: hard · usually a technician job

Symptoms that often accompany C3: Dishwasher will not start wash cycle; Fills with water but does not spray; Hums but no water movement

Technician diagnostic sequence for C3:

1. Power cycle at breaker for 2 minutes
2. Check that dishwasher is draining properly — standing water in tub indicates drain issue
3. Remove lower spray arm and filter assembly to inspect sump area for debris
4. Test pressure switch for continuity — should toggle when blown into
5. Check wiring between pressure switch and control board for breaks
6. Test wash pump motor for continuity (expect 5-20 ohms)

Parts a technician may check or replace: wash pump and motor assembly; control board; pressure switch

Field note: C3 can be triggered by a clogged filter restricting water flow to the pressure switch. Always clean the fine filter and check the sump before replacing electrical components. Bay Area hard water deposits are a frequent cause — descale with citric acid cycle first.

Safety note: The wash pump runs on 120V AC. Always disconnect power before accessing pump or pressure switch components inside the sump area.

How to troubleshoot the C3 error yourself#

The owner-safe part of C3 is all about water flow, not electronics. Start with a breaker power-cycle for a couple of minutes. Then confirm the dishwasher is draining properly — standing water in the tub points to a drain issue feeding the fault. Remove the lower spray arm and the filter assembly and inspect the sump for debris, because a clogged fine filter can restrict flow to the pressure switch and trigger C3 all by itself; in hard-water areas, running a citric-acid descale cycle first often clears it. Beyond cleaning, the diagnosis turns electrical: testing the pressure switch for continuity, checking the wiring to the control board, and measuring the wash-pump motor's continuity are technician tasks, and the wash pump runs on line voltage, so power must be off before anyone opens the sump area. If cleaning the filter and confirming drainage does not restore washing, stop and call a professional.

Is the GE Dishwasher C3 error worth fixing?#

C3 sits mid-to-high among dishwasher repairs at $200 to $450, reflecting a harder job that can involve the pressure switch, wiring, or the wash-pump assembly. Against a comparable new dishwasher that is still a saving, and if the fix is the pressure switch or a cleaning it lands at the lower end. The decision leans toward replacement only when the machine is old, the wash-pump assembly is the culprit, and the total approaches half the price of a new unit. For a newer dishwasher, the $200–$450 repair is generally the better value than replacing it.

GE Dishwasher C3: frequently asked questions#

What does the C3 error mean on a GE dishwasher?

C3 is a pump pressure-switch error: the control is not receiving the expected water-pressure signal, so the wash cycle stalls — often filling but not spraying.

Is it safe to keep using a GE dishwasher showing C3?

It is not dangerous, but the dishwasher will not wash properly, so it is effectively out of service until the flow restriction or pressure switch is addressed.

Can I clear the C3 error myself?

Sometimes. Confirm drainage and clean the filter and sump, since a clog can trigger C3. Testing the pressure switch, wiring, and wash pump is a technician job.

How much does it cost to repair the C3 error?

Professional C3 repair on a GE dishwasher runs $200 to $450, depending on whether the pressure switch, wiring, or the wash-pump assembly is at fault.

Which parts usually fail when a dishwasher throws C3?

The pressure switch is the most common failure, followed by a wiring issue, with a wash-pump motor fault the less common — but most expensive — culprit.

Why does a pressure-switch failure trigger C3?

The switch confirms adequate water pressure to the control. When it fails or a clog starves it of pressure, the control never gets that confirmation and posts C3.