Ourrth110b100 Would Not Come On Replaced Batteries And Still Will Not Come On

If you have difficulty with your thermostat, please try the suggestions below. Most

problems can be corrected quickly and easily.

Display is blank • Check circuit breaker and reset if necessary.

• Make sure heating & cooling power switches are on.

• Make sure equipment door is securely closed.

• If battery powered, make sure fresh AA alkaline batteries are installed.

Temperature

settings do not

change

Make sure heating and cooling temperatures are set to acceptable ranges:

• Heat: 40° to 90°F (4.5° to 32°C).

• Cool: 50° to 99°F (10° to 37°C).

Heating system

does not respond

(“Heat On”

appears on

screen)

• Check for 24 Vac at the equipment on the secondary side of the transformer

between power and common. If voltage is not present, check the

heating equipment to find the cause of the problem.

• Check for 24 Vac between the heat terminal (Y) and the transformer

common. If 24 Vac is present, the thermostat is functional. Check the

heating equipment to find the cause of the problem.

• Check for loose or broken wires between the thermostat and the heating

equipment.

Cooling system

does not respond

(“Cool On”

appears on

screen)

• Check for 24 Vac at the equipment on the secondary side of the transformer

between power and common. If voltage is not present, check the

cooling equipment to find the cause of the problem

• Check for 24 Vac between the cooling terminal (Y) and the transformer

common. If 24 Vac is present, the thermostat is functional. Check the

cooling system to find the cause of the problem.

• Check for loose or broken wires between the thermostat and the cooling

equipment.

“Cool On” or

“Heat On”

is flashing

• Compressor protection timeout is engaged. Wait 5 minutes for the

system to restart safely, without damage to the compressor.

“Heat On” is

not displayed

• Set the System switch to Heat, and set the temperature level above the

current room temperature.

“Cool On” is

not displayed

• Set the System switch to Cool, and set the temperature level below the

current room temperature.

I hope this is helpful to you!

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