Bradford White RG2PV40T6N 40 Gallon 40,000 BTU Power Vent Gas Water Heater with Defender Safety System MECH-PRESSURE-SWITCH Error Fix: Pressure Switch Failure — Won't Ignite

Error code MECH-PRESSURE-SWITCH on the Bradford White RG2PV40T6N 40 Gallon 40,000 BTU Power Vent Gas Water Heater with Defender Safety System means: Pressure Switch Failure — Won't Ignite. The pressure switch on the power vent system is not closing to prove draft, preventing the gas valve from firing. The pressure switch is a safety device that confirms the blower motor has created sufficient negative pressure (draft) to safely vent combustion gases. Check the rubber tubing connecting the pressure switch to the blower housing — it may be cracked, kinked, or disconnected. Verify the blower is actually running at full speed. Check the vent piping for blockages (ice, bird nests, debris). The condensate drain on the vent system must be clear — a clogged drain can cause water to block the vent and trip the pressure switch. If the tubing and vent are clear and the blower runs, replace the pressure switch.

The most successful fix is "Replace the Pressure Switch Assembly" (hard difficulty, ~60 minutes). Estimated DIY cost: $10-$20. 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 the Pressure Switch Assembly") is rated hard difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Needle-nose pliers, Multimeter.

DIY cost: $10-$20. Professional repair typically costs $200-$300. 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-PRESSURE-SWITCH also appears on 1 other Bradford White model: 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.