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Troubleshooting
10. Igniter Glows, Sensor Opens But No Ignition – Johnson Controls System
Gas Models
NOTE: To check the primary and secondary valve coil and plunger operation, place fingers on top of coils,
cycle the machine and restart ignition circuit, you should feel the primary valve coil plunger open first,
followed by glow bar heat up, followed by the sensor opening, and the secondary valve coil plunger opening.
If plungers do not open, electrically check the coils. Check gas pressure to tumbler. Line pressure should be
7 ± 1/2 inches (Natural Gas) or 11 inches (L.P. Gas) water column pressure. Manifold pressure should be 3.5
inches (Natural Gas) or 11 inches (L.P. Gas) water column pressure.
Igniter glows, sensor
opens but no ignition -
Johnson Controls
System Gas Models
Is gas supply
insufficient?
Check gas supply
and pressure.
Is there gas
flow but no
ignition?
Remove igniter and bracket and bend
“L” shaped bracket (located on left
side of stove) up or down. Reinstall
igniter and bracket and check for
1/8 to 1/4 inch gap between bottom
of igniter and top of main burner.
Is there no
gas flow
through gas
valve?
Check primary valve coil and plunger.
Replace coil if inoperative, or check
for 120 Volts to control relay (PR1)
coil contacts (A) and 120 Volts to
control relay (PR1) contact number 7.
If no voltage, replace control relay
(PR1) or check secondary valve coil
and plunger operation. Replace coil
if inoperative.
Yes
Yes
No
Yes
TMB2139S
No
Содержание ATB50CG
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