Red light is on
If thermostat is in Emergency Heat mode the red light is normal. It shows that the thermostat is
in emergency heat mode.
If thermostat is not in Emergency Heat mode, contact a qualified service contractor for repair.
Heating or cooling system does not respond
Press SYSTEM to set system to Heat. Make sure the temperature is set higher than the Inside
temperature.
Press SYSTEM to set system to Cool. Make sure the temperature is set lower than the Inside
temperature.
Check circuit breaker and reset if necessary.
Make sure power switch at heating & cooling system is on.
Make sure furnace door is closed securely.
If “Wait” is displayed, the compressor protection timer is on. Wait 5 minutes for the system to
restart safely, without damaging the compressor (see page 29).
Need help?
Visit http://yourhome.honeywell.com or call 1-855-733-5465 for assistance.
Glossary
MAC ID, MAC CRC
Alphanumeric codes that uniquely identify your thermostat.
QR Code®
Quick response code. A two-dimensional, machine-readable image. Your wireless device can read the
black and white pattern in the square and link its browser directly to a web site. QR Code is a
registered trademark of DENSO WAVE INCORPORATED.
Regulatory information
FCC Compliance Statement (Part 15.19) (USA only)
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause
undesired operation.
FCC Warning (Part 15.21) (USA only)
Changes or modifications not expressly approved by the party responsible for compliance could void
the user’s authority to operate the equipment.
FCC Interference Statement (Part 15.105 (b))
(USA only)
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful
interference in a residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will
not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
Consult the dealer or an experienced radio/TV technician for help.
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