MECH-CONDENSATE
Bradford White · RG2PV50H6N 50 Gallon 40,000 BTU Power Vent Gas Water Heater with Defender Safety System
The condensate drain on the power vent system is clogged, causing water to back up in the vent system. High-efficiency power vent water heaters produce acidic condensate that must drain away. If the drain line becomes clogged with mineral deposits or algae, condensate accumulates in the vent piping and can trip the pressure switch or damage the blower motor. Clear the condensate drain line with compressed air or a pipe cleaner. Ensure the drain line slopes downward to its termination point. The condensate is mildly acidic — route it to an appropriate drain. Some installations use a condensate neutralizer kit.
Error MECH-CONDENSATE on the Bradford White RG2PV50H6N 50 Gallon 40,000 BTU Power Vent Gas Water Heater with Defender Safety System means: Condensate Drain Clogged. The top-ranked community fix is “Replace and Re-route the Condensate Drain Line” (medium difficulty, ~45 min, DIY cost: $15-$25). 2 community-ranked fixes available below.
Published February 2026 · 2 fixes · water heater
Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.
While many water heater repairs can be done safely at home, consider hiring a qualified technician if:
Average professional repair cost for this issue: $120-$180.
Normal Operation — System OK
Thermopile Voltage Low
High Temperature / ECO Trip
Temperature Sensor Failure
Gas Control Valve Electronics Failure
Power Interruption / Loss of Pilot Signal
No Power to Gas Control — LED Dark
Anode Rod Depleted — Rotten Egg Smell or Corrosion
The Bradford White RG2PV50H6N 50 Gallon 40,000 BTU Power Vent Gas Water Heater with Defender Safety System has 8 other known error codes:
Error code MECH-CONDENSATE also appears on 1 other Bradford White model:
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