Troubleshooting - Mr. Heater MH4B Operating Instructions And Owner's Manual

WARNING: Never use needles, wires or similar cylindrical
objects to clean the pilot to avoid damaging the
calibrated ruby that controls the gas flow through the
pilot orifice.
7. Apply compressed air (max 30 psi) into the ceramic
tile of burner assembly and venturi tube (ref. 13) to
remove dust, lint and spider webs.
8. Reinstall the right side plastic service panel.
TROUBLESHOOTING INFORMATION:
If Spark electrode does not produce spark.
CHECK
electrode. -- attach
assembly.
If Spark electrode produces spark but pilot does not light.
CHECK
cylinder.
pilot, see MAINTENANCE.
If Pilot flame does not stay lit when button is released.
CHECK
to purge air from line.
clean pilot, see MAINTENANCE.
•
tip switch (check off switch and off switch
wiring).
If Main burner does not ignite.
CHECK
see MAINTENANCE.
If Heater keeps shutting "OFF" during normal operation.
CHECK
MAINTENANCE.
Re-light
—INTENTIONALLY LEFT BLANK —
5
2016 15125 CB