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GOLD CGa Gas-Fired Water Boiler — Boiler Manual
56
Part Number 550-101-009/0107
• Reset boiler control by turning off power at service switch or turning down thermostat for at least 45 seconds.
• Thermostat should call for heat and appropriate zone valves open. The TSTAT CIRC and LIMIT lights should come on.
Does vent damper operate?
Electrical shock hazard — Wherever you see TURN OFF POWER , follow the instructions. Failure to follow
instructions could result in severe personal injury, death or substantial property damage.
• Boiler should be in
normal operating
sequence.
• Observe operation until
thermostat is satisfied.
Are the TSTAT CIRC and LIMIT lights on steady?
• Replace control
module.
• Retest.
• Make sure thermostat is
calling for heat. If lights
still don't come on, see
Chart 7, page 59.
• Try reseating plug in
module receptacle and
restart.
• If vent damper still does
not work, replace vent
damper assembly or
actuator.
• Retest.
No Yes
• Wait 45 seconds.
Does vent damper operate?
No Yes
• Remove DAMPER plug (Figure 30, Item 6, page 53)
from plug receptacle of control module.
• Place voltmeter leads across the top two pins (1 and 4)
of the DAMPER receptacle.
Does the voltmeter indicate 24 VAC?
No Yes
Does vent damper actuator
indicator show damper is
open?
No Yes
• Remove damper wiring
plug at damper and firmly
reconnect.
• Recheck boiler operation.
• If problem persists,
replace vent damper
assembly or actuator.
No Yes
Yes No
— If POWER light is flashing: Usually indicates vent damper failed to prove open within 5 minutes —
— If POWER light is steady: Usually indicates vent damper closed during run cycle —
• Replace vent damper
assembly or actuator.
• Retest.
• Wait 5 minutes.
Is PRESS SWITCH light flashing?
CHART 4 — Spark-ignited pilot — DAMPER light flashing
11c Troubleshooting — spark-pilot boilers (continued)