|
Problem
|
Resolution
|
| Heats
or cools more than 3 degrees past the set temperature and/or
will not cut off |
- Replace
the batteries with unused, fresh, good quality alkaline
batteries.
- Verify
the wiring to be proper according to the wiring schematic
for your system.
- Decrease
the swing deferential to a lower number. Refer to the programming
section of your control model.
- Contact
our Technical Assistance Line if not resolved.
|
| No
heat or cooling when calling for heat or cooling, or short cycling.
That is running a few seconds, cutting off, then coming back
on |
- Replace
the batteries. Press reset with a pencil point. Reprogram.
- Confirm
proper wiring installation.
- The
contacts may need to be squeezed toward each other SLIGHTLY.
The contacts are two brass prongs located above each letter
designation, above the wire terminals on the subbase.
- Using
a pencil eraser, clean off the single contact pens on the
circuit board.
- If
you are technically inclined, you may jump the terminals
out to detect a malfunction in your system. Follow the steps
below for LOW VOLTAGE ONLY. To test heating, take
the "W" and "RH" wires off the thermostat. With the power
ON at the fuse box, touch the wires together for a couple
of minutes and the heater should come on and stay on. For
a single stage heat pump, you must join all four wires
together. If the heat pump does not come on, or if the system
short cycles, the problem is not in the thermostat. Note:
TX500 is NOT compatible with heat pumps. To test
cooling, remove the G, Y and RC wires. Hold these 3
wires together for several minutes to observe operation.
The system should come on and stay on. If the cooling fails
to come on, or comes on and short cycles, the problem is
in the system, not the thermostat. (If you do not have RC,
use the RH wire.)
|
| Heating
and cooling compressor okay but no fan function |
- If
you have a 2-wire system,heating only, the thermostat does
not control your fan. The problem would be in the system.
- If
you have the fan wire properly installed at the "G" terminal,
squeeze the contacts (2 brass prongs above the "G" letter)
toward each other SLIGHTLY.
- If
persists, contact our service line to determine the origin
of the problem.
|
| Fan
locked, will not cut off |
- Operate
the Fan switch in the AUTO position. The ON position calls
for the fan to run continually.
- Remove
the "G" wire. If fan continues, the problem is in the system,
not the thermostat.
|
| You
have a proper display, but nothing is operating, no fan, no
heat, no cooling when calling for each function |
- Check
the power at the fuse or breaker box to insure power coming
to the thermostat.
- If
power on but no power coming to the thermostat, contact
our service line for assistance.
|
| No
fan function in heat mode |
- Gas
and oil heating systems control the fan/air handler. If
the fan is not operating, it is a heating system problem,
not a thermostat problem.
- The
thermostat does control the operation of the fan with electric
heating systems. Verify the wiring to insure correct hook
up. Make sure the jumper wire is connecting RH to RC. (Note:
see different wiring for a Heat Pump installation)
- Squeeze
the contact pins above the G and RH terminals on the subbase
slightly toward each other to insure a better contact.
- Move
the switch on the circuit board to ELECTRIC for electric
heat.
- Contact
our service line.
|
