Honeywell RTHL2510 User Manual

Page 22

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Operating Manual

69-2579ES—01 20

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).

“Cool On” or
“Heat On” is
flashing

• Compressor protection feature is engaged. Wait 5 minutes for the system

to restart safely, without damage to the compressor (see page 15).

“Heat On” is not
displayed

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

current room temperature (see page 7).

“Cool On” is not
displayed

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

current room temperature (see page 7).

In case of difficulty

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