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Troubleshooting Chart – Honeywell V2
LED Status
None (LED not on
or flashing)
One flash every
four seconds
(LED green)
One flash every
second
(LED green)
Two flashes and
three second
pause (LED
yellow)
Four flashes and
three second
pause (LED red)
Five flashes and
three second
pause (LED red)
Solid ON
(LED red)
Control Status
Not an error.
Indicates control is in
OFF mode. Pilot is
off.
Not an error.
Indicates pilot is lit
and main burner is
off.
Not an error.
Indicates main valve
is open and main
burner is lit.
Low thermopile
voltage; main valve
not turned ON.
Temperature cut-out
limit reached,
causing shutdown.
Electronics, sensor,
or gas valve fault
detected.
Not an error.
Indicates that the
control is in shutdown
mode. Pilot is off.
Probable Cause
Gas valve is functioning normally.
Gas valve is not powered. Light pilot.
The knob can be turned to a desired
setpoint temperature.
None. Control will automatically shut
main burner off when water
temperature reaches the setpoint
temperature.
Check thermopile and its
connections. Check pilot flame.
Check the valves and the water
temperature sensor. Reduce the
water temperature setpoint. Verify
control operation, replace if
exceeding setpoint.
Check water temperature sensor and
its connection for open circuits,
shorts, or differences in resistance
between the two sensor elements.
None; wait until LED turns off if you
want to restart system.
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