Blower Testing And Replacement - Bradford White EF Series Service Manual

Does blower
Y
energize?
N
Determine
power
source
problem
and
correct
Is there 120VAC
across the white and
N
black wires at the
terminal block ?
(see photo 17)
Y
Refer to ignition module
illustration.
N
Is there 120VAC between
P5(1) and P5(3)?
Y
Is there 120VAC
across the white and
N
black wires at the
blower?
(see photo 19)
Y
Replace blower.
(see pg 26)
Is there a minimum of
98VAC across the
Y
white and black wires
at the terminal block ?
(see photo 17)
N
Check amp draw through
BLACK wire lead of blower
motor. Is there .6 to 1
amps?
(see photo 18)
N
Replace blower.
Refer to ignition
module, is there 24 Are safety circuits in normal position?
Y
VAC between P3(7) See Safety Circuit Trace on Page 27
and ground?
N
Thermostat not
calling for heat.
(see page 12)
Repair/replace
wire harness.
Service Procedure EF-V

Blower Testing and Replacement

Refer to ignition module
N
illustration.
Is there 120VAC between
P5(1) and P5(3)?
Y
17
Is Blower wheel secured to
Y
blower motor shaft?
N
(see pg 26)
N
Correct safety circuit problem per
safety circuit trace
on page 27.
19
IGNITION MODULE
Replace
ignition module.
(see pg 34)
Black wire leading to
blower motor looped
through amprobe.
Call technical
Y
support.
Replace ignition module.
Y
(see pg 34)
18
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