Bradford White · AeroTherm (RE2H…-1NCTT models)
Bradford White AeroTherm (RE2H…-1NCTT models) error code F11
What it means
Dry tank fault. This test is run within the first 22 minutes after the water heater has powered on (the compressor is engaged for 20 minutes after a 2 minute wait for the high and low side pressures to equalize). The tank temperature, T2, is read and verified it has not risen more than 5°F. If it has, this indicates there is not enough water in the tank for water heater operation. After 1 failed dry tank test, "F11" is displayed. After 5 failed tests, an audible alarm will sound.
The manual says the control must detect this 1 time(s) before the code is displayed.
What Bradford White says to do
Turn the power OFF, finish filling the tank with water, then turn the power back ON. Contact a certified technician to assess and repair the water heater based on the fault codes.
Source for these steps: Heat Pump Water Heater Installation & Operation Instruction Manual (RE2H50S*-1NCTT, RE2H65T*-1NCTT, RE2H80T*-1NCTT), 238-52169-00C (ECO 8424), page 17
Last checked 2026-10-03.
Safety first
- DANGER: Shut OFF power to the water heater before draining water to avoid risk of shock. (p.23)
- CAUTION: For your safety, do NOT attempt to repair the water heater or any of its parts. Refer any repairs to a qualified service technician. (p.22)
- Fault codes should only be used to help identify components which require testing. Never replace a part based solely on a fault code. The control can generate a false fault if the right conditions exist. (p.28)
From the manufacturer's manual for this series.
The same code on other models
Codes mean different things on different heaters. Match the series to the model number on your rating label.
- Bradford White Heat pump RE2H (-1NCWT models): F11
- GE GeoSpring GEH50DEED (2012–2014): F11
- GE GeoSpring DEEJS / DFEJS (2015–2016): F11
- GE Profile GEOSPRING Smart (PF / PH, 2025 on): F11, F21