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TROUBLESHOOTING GUIDELINES
TROUBLE SHOOTING
Please check guidelines below. For your safety, water heater service should be performed only by a qualied service technician.
Read the GENERAL SAFETY INFORMATION section rst.
INTELLI-VENT TROUBLESHOOTING CHART - USER CONTROL
PROBLE
MS
OLUTION
15
# LED STATUS
B C D E F
1. Turn off power to the water heater.
2. Unplug the ignitor assembly plug from the control. Check
the resistance of the black resistor wire between pins
3 & 4 with an ohm meter. 2.1 If the reading taken is more
than 100,000 (50,000 for data code before 0616; 70,000
for data code 0617 through 0709) ohms replace the ignitor
assembly. 2.2 If the reading taken is less than 100,000
(50,000 for data code before 0616; 70,000 for data code
0617 through 0709) ohms replace Intelli-Vent™ control.
The self-diagnostic test determined resistance
of the black resistor wire on ignitor assembly
plug is not within tolerance.
1. Ensure air pressure switch hose is not kinked or clogged;
ensure the blower housing is clear of any condensation.
2. Check vent temperature limit switch - if it is determined
that the vent temperature limit switch is opening its
contacts at normal operating temperatures during heating
cycle - replace the vent temperature limit switch.
3. Ensure water heater is not over-firing. 3.1 Check burner
orifice size and ensure the correct orifice is installed;
replace as necessary. 3.2 Check manifold gas pressure
and ensure it is within
0.3” W.C. (75 Pa)
of listed rating on
Intelli-Vent™ control valve. Manifold gas pressure is
non-adjustable, if manifold gas pressure is off by more
than
0.3” W.C. (75 Pa),
replace the Intelli-Vent™ control.
4. Ensure condensate lines are not obstructed. Check and
clear all condensate lines including the floor condensate
drain line.
Air pressure switch circuit is opening
repeatedly during one heating cycle. May be
caused by air pressure switch and/or the vent
temperature limit switch (these two switches
are wired together in a “series” circuit).
16
B C D E F
WATER HEATER CONTROL