A18
Beretta
Condensate Drain Fault
Furnace shows A18, may indicate condensate drainage problem on condensing models
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Blocked condensate trap, Blocked condensate hose, Frozen condensate pipe, Faulty condensate level sensor (if fitted)
How to Fix / Troubleshooting
Safety: Turn off power. Condensate is mildly acidic; wear gloves and eye protection.
- Inspect condensate trap: Locate the plastic condensate trap at the base of the heat exchanger. Remove it according to the Beretta manual. Rinse thoroughly with clean water to remove sludge.
- Check hoses and outlet: Ensure the condensate hose from the trap to the drain is not kinked, blocked, or frozen. Clear any blockage and insulate external sections in cold climates.
- Reassemble and test: Refit the trap, ensuring seals are correctly seated. Restore power and run the furnace, checking for proper condensate flow.
If A18 persists, a condensate level sensor or related wiring may be faulty and should be checked by a technician.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Condensate Trap
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements