Code: 62🚿 Bradford White Water Heater

Bradford White Error Code 62: Fan Speed Not Proved (eF Series)

Reviewed 2026-10-24 · Based on 4 manufacturer & service sources

What the code means

Bradford White's eF Series service manual (238-54464-00) and its ICON HD quick service guides (238-55958-00 and 238-55603-00) define code 62 as "Fan speed not proved." The control drives the combustion blower with a PWM (pulse width modulation) signal and reads the blower's speed back through the 5-wire modulation harness at the J2 connection. If the speed doesn't match, the heater sits in a hold condition instead of lighting. The service manual says that if the blower speed isn't verified within 5 minutes, code 62 changes from a hold to a lockout, which Bradford White lists as 123 (fan speed not proved, purge rate proving failed); 122 is the related light-off rate proving failure. The heater's normal sequence starts the blower at a reduced "soft start" speed and runs a pre-purge of about 15 seconds before ignition, so a blower that can't reach or report the right speed stops the sequence at that step. Code 62 on the eF Series is not the same as codes on Bradford White's Infiniti GS and GR tankless heaters, whose error tables have no code 62.

Likely causes

Safe DIY checks

⚠ Before you start

Unplug the appliance (or switch off its breaker) and shut off the water supply valves before removing panels or disconnecting hoses. Keep towels handy for residual water.

  1. Go outside and check the vent and air intake terminations for blockages such as leaves, nests, snow or ice, and clear them if you can do so safely.
  2. Make sure nothing is stacked against or covering the intake and exhaust pipes near the heater.
  3. Note whether the code shows as 62 only or has moved on to 123, and tell your technician; 123 means the hold has turned into a lockout.
  4. Don't keep resetting the heater if the code returns. Bradford White's manuals warn that resetting lockouts without fixing the cause can create a hazardous condition.
  5. Wiring and blower checks involve 120-volt power, so leave those to a qualified technician.

🛠 When to call a pro

  • Check for vent and intake restriction, then confirm vent length is within specification.
  • Check the blower modulation (PWM) wire harness connection from the blower to the control module at J2, make sure the pin terminals make solid contact, and measure the resistance of each wire in the harness from the terminal ends. Replace the harness if it's defective.
  • With the display showing "Heating" (raise the setpoint if needed), check for 110 to 120 VAC between the black and white wires of the 3-wire harness at the blower. If the display shows heating and there's no voltage at the blower, the service manual says to verify 120 V from the power switch and replace the power cord or blower harness.
  • If the blower runs, Bradford White's chart has you measure between the yellow wire at J2 and ground for 17 to 30 VDC and confirm the 5-wire modulation harness is plugged in to the blower (if it's unplugged, the blower runs constantly). Depending on those results, the chart ends at replacing either the blower or the control board.
  • Bradford White's blower test also checks amp draw on the blower's black lead (about 1.5 to 5.5 amps) and that the blower wheel is secured to the motor shaft.
  • Bradford White technical support is listed at 800-334-3393.

Parts that commonly fix it

Always match the part number to your exact model.

⚙

Combustion blower

Must be the exact part for your model and serial number; a technician should replace it.

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Digital multimeter

Used to check harness continuity and voltage; leave live-voltage tests to a technician.

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⚙

Carbon monoxide alarm

Recommended in any home with a gas water heater.

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Sources

  1. Bradford White Service Manual 238-54464-00 (eF Series ultra high efficiency with ICON): code 62 Fan speed not proved, PWM harness checks and resistance test, changes to lockout 123; 122/123 entry (blower speed not verified within 5 minutes, replace blower or control module if harness is good); code 62 troubleshooting chart (110-120 VAC at blower, 17-30 VDC yellow J-2 to ground); blower test (1.5-5.5 A); sequence of operation (soft start, 15 s pre-purge)
  2. Bradford White Quick Service Guide 238-55958-00 (eF Series 125-500K ICON HD): 62 Fan speed not proved, changes to lockout 123, check vent/intake restriction and J2 harness continuity, parts blower then control board; Technical Support 800-334-3393
  3. Bradford White Quick Service Guide 238-55603-00 (eF Series ICON HD Sola control): 62 Fan speed not proved, same checks and parts; 122 and 123 for contrast
  4. Bradford White Infiniti GS Installation and Operation Instructions 238-54627-00, section 6.1 error table (no code 62 listed)

Last reviewed 2026-10-24. Always confirm against the manual for your exact model number.