15
READ THIS ENTIRE SECTION BEFORE
BEGINNING TO TROUBLESHOOT PROBLEMS.
The following troubleshooting flow charts provide systematic
procedures for isolating heater problems. The charts are
intended for use by a QUALIFIED GAS HEATER SERVICE
PERSON.
DO NNOT SSERVICE TTHE HHEATER UUNLESS YYOU HHAVE
BEEN PPROPERLY TTRAINED.
TEST EQUIPMENT REQUIRED
The following pieces of test equipment will be required to
troubleshoot this system with minimal time and effort.
• Digital MMultimeter
- For measuring DC voltage when using
thermocouple diagnostic kit.
• Thermocoup
le DDiagnostic KKit
- (Part # 21188) When used
with a standard digital multimeter, this kit allows testing of
the thermocouple and electromagnetic power unit.
• Pressure GGauge
- (Part # 20736) For checking inlet
pressures to the heaters.
INITIAL PREPARATION
-- Inspect heater for damage.
-- Clean heater as necessary.
Heater PProblems
Page
1. Inner Combustion Cone will not Light . . . . . . . . . . . . . . .16
2. Inner Combustion Cone Lights,
but will not Stay Lit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3. Outer Combustion Cone Does Not Heat up on
High Thermostatic Head Setting . . . . . . . . . . . . . . . . . . .18
4. Heater Backflashes Gas Through Injector Body
Air Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Components should be replaced only after each step has
been completed and replacement is suggested in the flow
chart.
Troubleshooting Guide
WARNING
BBuurrnn HHaazzaarrdd
■ Troubleshooting this system may require operating the
heater with the burner on. Use extreme caution when
working on the heater.
■ Failure to follow this warning will result in burns
causing severe injury.
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