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19 69-0643—1
Timer does not —Voltage across the two C Remove thermostat from the wallplate
run (continued). terminals. or subbase and measure the voltage.
Refer to Voltage at Timer Terminals
table for cause and reaction.
—Pins in program dial. If pins are Push down on pins to make sure they
not completely seated in are completely seated in program dial.
program dial, jamming with
index wheel can occur.
Timer loses time. —Power may be interrupted. Make sure power is on. Reset timer.
—High limit control. If timer Wire separate transformer to power
powered through system timer, or install backup batteries as
transformer, power to timer shown in Fig. 2.
and equipment may be off
on safety.
—Filter may be clogged. Safety Replace filter and reset timer.
limit on equipment can cut off
power to system.
Troubleshooting (Continued)
(continued)
Problem Check Action