Bradford White RG2PV40T6N 40 Gallon 40,000 BTU Power Vent Gas Water Heater with Defender Safety System MECH-PILOT Error Fix: Pilot Light Won't Stay Lit

Error code MECH-PILOT on the Bradford White RG2PV40T6N 40 Gallon 40,000 BTU Power Vent Gas Water Heater with Defender Safety System means: Pilot Light Won't Stay Lit. The pilot flame lights but extinguishes when the control knob is released from the PILOT position. The thermopile needs 30-60 seconds of pilot flame contact to generate enough voltage to hold the gas valve open. Hold the knob down for a full 60 seconds before releasing. If the pilot still won't stay lit: clean the thermopile tip with emery cloth, check for drafts near the burner compartment, clean the pilot orifice with compressed air (do not use a needle), and verify venting is not blocked. A weak pilot flame (yellow, flickering) indicates a clogged pilot orifice or insufficient combustion air. Replace the thermopile if cleaning does not resolve the issue.

The most successful fix is "Replace Thermopile and Inspect Venting" (medium difficulty, ~60 minutes). Estimated DIY cost: $30-$50. HomeMD has 2 community-ranked fixes for this error.

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Yes — the top-ranked community fix ("Replace Thermopile and Inspect Venting") is rated medium difficulty and takes about 60 minutes. Tools needed: Phillips screwdriver, Adjustable wrench, Multimeter.

DIY cost: $30-$50. Professional repair typically costs $150-$220. Many homeowners save money by trying the top-ranked community fix first.

The Bradford White RG2PV40T6N 40 Gallon 40,000 BTU Power Vent Gas Water Heater with Defender Safety System has 8 other known error codes, including: 1-FLASH (Normal Operation — System OK), 2-FLASH (Thermopile Voltage Low), 4-FLASH (High Temperature / ECO Trip), 5-FLASH (Temperature Sensor Failure), 7-FLASH (Gas Control Valve Electronics Failure), and 3 more.

Error code MECH-PILOT also appears on 6 other Bradford White models: D-W-2-75T6BN Ultra Low NOx, MI50S6BN 50 Gallon 76,000 BTU Magnum Series Commercial Natural Gas Water Heater, MI50T6FBN 50 Gallon 40,000 BTU Natural Gas Magnum Commercial Water Heater, RG240T6N eF Series, RG250T6N 50 Gallon 40,000 BTU 0.67 EF Defender Safety System Gas Water Heater, RG2PV50H6N 50 Gallon 40,000 BTU Power Vent Gas Water Heater with Defender Safety System. The fix may vary by model, so check each model's specific page for tailored repair steps.