H-17 • Radiant Heaters
Owner’s Manual • H-17
19
Troubleshooting Guide
READ THIS ENTIRE SECTION BEFORE
BEGINNING TO TROUBLESHOOT PROB-
LEMS.
The following troubleshooting
fl
ow charts provide
systematic procedures for isolating heater problems.
The charts are intended for use by a QUALIFIED
GAS HEATER SERVICE PERSON. DO NOT
SERVICE THE HEATER UNLESS YOU HAVE BEEN
PROPERLY TRAINED.
TEST EQUIPMENT REQUIRED
The following pieces of test equipment will be
required to troubleshoot this system with minimal time
and effort.
• Digital Multimeter - For measuring DC voltage when
using thermocouple diagnostic kit.
• Thermocouple Diagnostic Kit - (L. B. White Part No.
500-21188) When used with a standard digital multi-
meter, this kit allows testing of the thermocouple and
electromagnetic power unit.
• Pressure Gauge - (L. B. White Part No. 500-20736)
For checking inlet pressures to the heaters.
INITIAL PREPARATION
-- Inspect heater for damage.
-- Thoroughly clean the heater.
Heater Problems
Page
1. Heater does not light ........................ 20
2. Flames extending beyond
emitter or lazy
fl
ame ......................... 20
3. Heater lights but does not stay lit ..... 21
4. Emitter does not fully heat up ........... 22
5. Heater back
fl
ashes gas through
air housing inlet ................................ 22
Components should be replaced only after each
step has been completed and replacement is
suggested in the
fl
ow chart. Refer to the servicing
sections as necessary to obtain information on
disassembly and replacement procedures of the
component once the problem is identi
fi
ed by the
fl
ow chart.
WARNING
Burn Hazard
■
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.
