Monogram Dishwasher C3 Error: Fill timeout / long fill
The C3 error code means the dishwasher attempted to fill with water but the tub did not reach the required water level within the maximum allowed fill time. The control board times the fill phase and triggers this fault if the float switch or pressure sensor does not confirm an adequate water level.
~45%
DIY Fixable
From $100
Typical Repair Cost
1–2 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Running cycles without adequate water can burn out the wash pump motor and heating element. Do not use the dishwasher until normal fill is confirmed.
Can I reset the code?
Yes. Once the water supply restriction is corrected, reset by pressing cancel or cutting power for 60 seconds. The unit should fill normally on the next cycle.
When to stop immediately?
Stop if you notice: Stop immediately if the pump or motor makes a high-pitched whining sound, which occurs when the wash pump runs dry due to insufficient water., Stop running cycles if the C3 code returns after the supply valve and screen have been checked and cleared..
Symptoms You May Notice
Dishes come out poorly washed or dry without cleaning
Because the tub never filled properly, the spray arms had insufficient water to circulate, leaving dishes greasy, spotted, or completely uncleaned.
C3 displayed on the control panel
The fault code appears early in the cycle, usually within the first two to three minutes, as that is when the fill phase takes place.
No water sounds during the wash phase
A normally filling dishwasher produces a distinct gurgling or rushing water sound. An absence of these sounds during the fill phase is a clear indicator the water supply is restricted.
Wash cycle completes unusually fast
The appliance may abort the cycle very quickly because the control board detects that fill conditions were never met, causing it to skip the wash phase entirely.
Possible Causes
Closed or partially closed water supply valve
The shutoff valve under the sink supplying the dishwasher may have been inadvertently turned off or left partially closed, severely restricting water flow into the unit.
DIY PossibleClogged water inlet valve screen
The water inlet valve contains a small mesh screen that filters sediment from the supply line. Over time this screen can become clogged with mineral deposits, reducing flow to a trickle.
DIY PossibleFaulty water inlet valve or float assembly
The solenoid-operated water inlet valve may have failed electrically or mechanically, or the float switch inside the tub may be stuck in the up position, falsely signaling a full tub.
Requires ProfessionalSafe Checks You Can Do
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1
Confirm the water supply valve is fully open
Locate the hot water shutoff valve under the kitchen sink (usually a straight or angle stop valve connected to a braided supply line leading to the dishwasher). Turn it fully counter-clockwise to ensure it is open.
If the valve has not been moved in years it may be partially closed or corroded. Replace it if it does not turn smoothly.
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2
Check household water pressure
Turn on the hot water tap at the kitchen sink. The stream should be strong and consistent. Low household water pressure (below 20 psi) can prevent the dishwasher from filling fast enough.
If other fixtures also show low pressure, the issue is with the home supply rather than the dishwasher.
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3
Inspect the inlet valve screen for sediment
Turn off the supply valve, disconnect the water supply line from the back of the dishwasher, and locate the small mesh screen inside the inlet valve port. Remove and rinse the screen under running water.
Soak a heavily clogged screen in white vinegar for 30 minutes to dissolve mineral deposits.
Tools required
When to Call a Professional
Contact a qualified technician if:
- The supply valve is fully open, household pressure is adequate, and the inlet screen is clean, but the tub still fails to fill.
- The water inlet valve solenoid does not click or hum during the fill phase, indicating an electrical failure of the valve.
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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