Honeywell RTHL3550 Installation Guide

SETUP

WIRING

ASSIST

ANCE

TR
OUBLESHOO

TING

For assistance with this product, please visit 

or call Honeywell Customer Care toll-free at 

.

To save time, please remove the battery holder and note 

your model number and date code before calling.

To order, please call Honeywell Customer Care toll-free at 

.

Battery holder ................................ Part No. 50007072-001 

Cover plate assembly* ................... Part No. 50002883-001

*Use to cover marks left by old thermostats.