Service Manual

47
Blocked Vent
Switch should be
installed on the lip
of the drafthood
Step 1.First determine is the “Blocked Vent Switch” was
installed correctly on the drafthood (see picture right).
Step 2. When Error Code 26 is
present you first must
determine if there is a blocked vent condition present.
If so, clear the obstruction and reset the switch then
continue with normal operation.
Step 3.If the switch is tripped and there is no obstruction in
the venting there could have been an
extended down
draft that tripped the switch. The down draft could
have been caused by damage vent termination.
Contact your plumbing professional to
correct this
issue.
Step 4. When no blockage or downdraft issues are present
check the continuity of the switch (see photo below).
If there is n
o continuity present even when switch is
reset the blocked vent switch assembly needs to be
replaced.
Step 5.If blocked vent switch assemb
ly is functioning
correctly check to see if the wire harness has any
signs of damage. Replace harness if any signs of
damage exist.
Step 6
. Restore water heater to use and confirm proper
operation following the lighting instructions on the
lighting instruction label or the li
ghting instruction
located in the installation and operating
instruction manual.
Set voltmeter to
Ohms setting. The
switch should be
very close to 0
ohms
47