Bradford White EFT-5500-4-S-10, EFT-7500-4-S-10, EFT-9500-4-S-10, EFT-6000-4-S-10, EFT-8300-4-S-10 Troubleshooting Manual

TROUBLESHOOTING GUIDE

ELECTRIC INSTANTANEOUS TANKLESS WATER HEATER

“THERMOSTATIC”

EFT MODELS

EFT-5500-4-S-10 240V
EFT-7500-4-S-10 240V
EFT-9500-4-S-10 240V
EFT-8300-4-S-10 208V
EFT-6000-4-S-10 277V
EFT-8000-4-S-10 277V
EFT-9000-4-S-10 277V
EFT-10000-4-S-10 277V

All information necessary to troubleshoot this

water heating unit is contained in this fully

illustrated guide. If problems still exist after reading

and carrying out the instructions in this manual,

contact Technical Service at the toll free number

below for assistance

PHONE TOLL FREE

1-800-334-3393

238-43142-00 Rev 3/12/02

GENERAL

UP

Serial number

Indicator
light

Out In

Water outlet/inlet (Bottom)

This is how your EFT thermostatic model should look when mounted correctly on
the wall.

Any

other mounting configuration will prevent the unit from operating properly.

If the unit is mounted correctly and still does not produce hot water, then look to
see if the indicator light illuminates when the hot water faucet is fully opened.

If the indicator light illuminates, turn to page 5.
If the indicator light does not illuminate, turn to page 3.
If the indicator light flashes once very quickly as you turn the water “ON”, turn to
page 7.

If the indicator light is pulsing, refer to the bottom of page 5.
All other possible situations turn to page 6.

U.L. rating label
Model # = Order Ref. #

2

The indicator light does not illuminate (When the hot water faucet is

fully opened):

STEP ONE:
Is the circuit breaker switched on at the main circuit breaker panel?

YES Go to Step two
NO Run water at the hot water faucet, for a couple of

minutes, before

STEP TWO:
The heating elements will not energize unless sufficient water is flowing through the

unit.

turning on the circuit breaker.
Then turn on the circuit breaker at the main
circuit breaker panel.

The minimum acceptable flow rate is 0.55 gallons per minute. Some
models require a higher flow rate, see chart below for specific model flow
rates. Measure the flow rate using the following procedure:

Fill a 1-gallon “milk” container and, using only water from the hot water
faucet, record the time (In seconds) required to fill. To calculate the flow

rate, divide the number of gallons the container holds (In this case one
gallon) by the time required to fill.

e.g. If it takes 87 seconds to fill the container, then the flow rate would be:

Flow rate (gpm) = v/t x 60 = (1 gal./ 87 sec) x (60 sec./1 min.) = 0.69 gpm.

Open all water valves completely. If the indicator light still does not
illuminate then proceed to STEP THREE.

MODEL TYPE / ORDER REF# MINIMUM FLOW RATE
EFT-5500-4-S-10, EFT-6000-4-S-10 0.55 GPM

EFT-7500-4-S-10, EFT-8000-4-S-10,
EFT-8300-4-S-10 0.65 GPM
EFT-9000-4-S-10, EFT-9500-4-S-10,
EFT-10000-4-S-10 0.75 GPM

3