Maytag F33
Pump Drive System
Medium severityExpert Guide
SeverityMedium
What Your Machine Is Actually Telling You
F33 means the CCU detected a fault in its pump drive circuit — the relay or TRIAC that controls the drain pump motor. Different from a mechanical pump failure.
Common causes:
1. CCU relay burned (35%).
2. Drain pump short (20%).
3. Wiring (15%).
4. Pump seized (10%).
5. Power surge (10%).
6. Solder crack (10%).
Common causes:
1. CCU relay burned (35%).
2. Drain pump short (20%).
3. Wiring (15%).
4. Pump seized (10%).
5. Power surge (10%).
6. Solder crack (10%).
What You're Probably Seeing Right Now
- Machine won't drain.
- Pump is silent or runs constantly.
- F33 appeared suddenly.
- Possible burning smell.
DIY Fix — From Easiest to Hardest
1
Power Reset (5 minutes)
1. Unplug 10 minutes.
2. Try Drain Only.
2. Try Drain Only.
2
Test Drain Pump (5 minutes)
1. Unplug.
2. Disconnect pump.
3. Measure: 5-30Ω = good. Very low = shorted.
4. If shorted: may have blown relay.
2. Disconnect pump.
3. Measure: 5-30Ω = good. Very low = shorted.
4. If shorted: may have blown relay.
3
Inspect CCU Board (5 minutes)
1. Look at pump relay area.
2. Burned relay?
3. Discolored traces?
4. Solder cracks?
2. Burned relay?
3. Discolored traces?
4. Solder cracks?
4
Replace CCU (20 minutes)
1. Replace CCU ($100-280).
2. Or send for repair ($80-150).
3. Also replace pump if shorted.
2. Or send for repair ($80-150).
3. Also replace pump if shorted.
When to Call a Pro
- •CCU board — $200-$500.
- •Board repair — $80-$150.
- •Pump + CCU — $250-$550.
What It'll Cost You
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