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7
TROUBLESHOOTING
Your Honeywell thermostat requires little or no attention. Most problems can generally be traced to the following:
Symptom
Checkout
Make sure power is on at
No heat.
main service panel. Turn
the temperature setting diale
fully ciockwise
.
Improper connections to
thermostat.
Other.
Heater never turns
Turn temperature setting
off.
dial fully
counterclockwise
.
Thermostat setting
Thermostat affected by
and thermometer
drafts or radiant heat.
reading disagree.
Thermometer is out of
calibration.
8
CALIBRATION
The CT62 Thermostats are calibrated at the factory using
precise instruments under closely controlled conditions.
Recalibration should not be necessary. Allow the thermo-
stat to operate for several hours before checking the
calibration. The CT62 Thermostat vapor-filled dual
diaphragm sensing element is affected by barometric
pressure and altitude. Temperature deviations of 10 F
[0.50 C] are normal. If the thermostat is mounted in a
suitable location and still appears out of calibration, check
calibration as follows:
Check Calibration
Turn the setting knob clockwise until the switch
makes (click sound). The heating equipment will
come on.
No recalibration is necessary If the thermostat switch
makes with the thermostat setting at the same
temperature as indicated on the thermometer.
If the thermostat setting differs from the thermom-
eter, record the temperature difference and
recalibrate as instructed in the Recalibration Procedure
section.
Recalibration Procedure
Note the temperature difference between the
temperature setting and the thermometer.
Remove the thermostat cover.
Rotate set point knob clockwise
until you hear
switch click.
Hold the set point knob firmly and rotate the set
point scale ring counterclockwise
until the
12 o'clock position of the ring agrees with the' cover
thermometer.
Actton
Heater should start to warm up within two minutes. If not,
contact qualified electrician to check thermostat and heater.
With power to circuit OFF, tighten all wiring connections. Repair
any frayed or broken wires.
Contact a qualified electrician for assistance.
Heater should start to cool within minutes. If not, turn off power
at the main service panel, and contact qualified electrician.
Contact electrician to change the location. The thermostat
should be about 5 ft [1.5m] above the floor and on an inside
wall.
Recalibrate. See step 8.
The heat from your hand will affect the diaphragm
sensor. Replace thermostat cover, wait 5 minutes
and recheck calibration.
THERMOSTAT
BASE
3
SETTING KNOB
AT 12 O'CLOCK
POSITION
SCALE RING
SETTING KNOB
M5796
95C-10866B
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