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Hot Surface Ignition Models Service Manual
2 Defective or Dirty Photocell Assembly
Inspect the lens of the photocell for soot/dirt, etc... If dirty,
wipe off with a clean, damp cloth.
Remove photocell assembly from heater. Turn the toggle
switch on the HA1170 tester to the "solid" red LED posi-
tion. Place the photocell boot over the red LED on the
tester. Connect the leads of an ohmmeter to the termi-
nals on the photocell assembly. Use the 0 to 20,000 OHM
scale on the meter. The resistance should measure
11,000 OHMS or less. If not the photocell is defective
and should be replaced.
Block off the light source by putting thumb over opening
of photocell. Replace the photocell if a change in resis-
tance is not observed.
The resistance should measure greater than 50,000
OHMS (use the 1 megohm scale on the meter).
3 Bad Electrical Connection(s) or Wired Incorrectly
Verify that all electrical connections are secure and mak-
ing electrical contact. Verify that wiring is per the wiring
diagram (see diagram, page 23).
4 Photocell Boot Not Properly Seated in Bracket
Make sure photocell boot is seated in bracket securely.
See illustration that follows.
Photocell
Photocell
Correct Photocell Placement
Incorrect Photocell Placement
For replacement parts contact:
www.PartsFor.com
