Aqua-Hot 400 Series Service Manual page 77

Does the Fan Vali-
Relay send power
to the Controller?
NO
Verify the Fan Vali-
dation Switch Relay
is receiving ade-
quate power and Replace the Control
ground from the
Electronic Control
Board.
Yes
Go to Page 78
Does the Fan Valida-
tion Switch have Conti-
nuity, while the blower
fan is running?
Yes
dation Switch
Yes
Board
NO
NO
1. Check Air Adjustment
2. Replace Fan Validation
Switch
© Aqua-Hot® AHE-400-P01 Service Manual Rev.B June 2014
Section #: Title
Burner Troubleshooting
NO
Is the Burner Controller
sending power to both
stages of the Gas
Valve?
Yes
1. Disconnect both sets of wires to
the gas valve.
2. Using a 12 VDC Power Source,
hot wire both sides of the gas
valve.
Does the
Gas Valve
NO
Replace the Gas Valve
p.
77