SECTION VII: TROUBLESHOOTING
CAUTION
For your safety, the repair and servicing of this equipment shall only be performed by a
qualified agency.
Page 35
Table 10: Troubleshooting
Problem
Possible causes
Recommended Action
Unable to light the main
burner
1) Air in the gas line.
1) Contact qualified agency to purge the air from the
gas line.
2) Vent or air intake system is blocked.
2) Contact qualified agency to inspect the system for
blockage.
3) Pressure switch stuck in open or closed position.
3) Make sure pressure switch hoses are not kinked.
Contact qualified service agency for replacement.
4) Loose wire connection.
4) Contact qualified agency to inspect wiring.
5) Energy Cut-Off (ECO) or Temperature Switch in
blower assembly tripped.
5) Contact qualified agency to inspect safety devices.
6) Hot surface ignitor is bad.
6) Contact qualified agency to inspect and/or replace
ignitor.
7) Check control error codes.
7) See Table 10.
Main burner does not stay lit
1) Energy Cut-Off (ECO) or Temperature Switch in
blower assembly tripped.
1) Contact qualified agency to inspect safety devices.
2) Flame sensor is bad.
2) Contact qualified agency to inspect and/or replace
sensor.
Condensation in heat
exchanger
1) Heating water for the first time (i.e. following
installation).
1) This is normal and will stop after water temperature
reaches setpoint.
2) Horizontal venting not sloped downward and away
from water heater.
2) Contact qualified agency to inspect vent
system.
3) Condensate kit not installed (vertical or horizontal
vent systems).
3) Contact qualified agency to install condensate kt.
Refer to this manual.
4) Vent & air intake system exceeds maximum.
4) Contact qualified agency to inspect vent & air
intake system.
Poor combustion (sooting,
yellow flame)
1) Accumulation of scale on burner.
1) Contact qualified agency to clean burner.
2) Vent or air intake system is blocked.
2) Contact qualified agency to inspect the system for
blockage.
Rumbling noise during burner
operation
1) Scale or sediment build-up in tank.
1) Drain the water heater to remove scale and
sediment.
Insufficient hot water
1) Heater undersized for load.
1) Reduce hot water usage rate.
2) Low gas pressure.
2) Check gas supply and manifold pressure
3) Check control error codes.
3) See Table 10.
4) Temperature setting of control is too low.
4) See Figure 21 for settings.
5) Circulator does not operate.
5) Check solar controller and power supply. Call
qualified agency to replace.
6) Undersized solar collectors.
6) Determine peak usage, compare to tank capacity,
add storage if necessary.
Water too hot or not hot
enough
1) Control temperature setting is too high or low.
1) Adjust setting as required, see Figure 21.
2) Control is defective.
2) Contact qualified agency to replace the control.
T&P relief valve is dripping
water
1) Excessive pressure condition in tank (greater than
150 psi).
1) Contact qualified agency to inspect water piping
system. Expansion tanks are required in closed
systems.
T&P relief valve is gushing hot
water
1) Excessive temperature condition in tank (greater
than 210°F).
1) Lower the temperature setting on the control.
See “Section V: Operation” for instructions to adj
