RTHL3550
Customer assistance
For assistance with this product, please visit
http://yourhome.honeywell.com
or call Honeywell Customer Care toll-free at
1-800-468-1502.
To save time, please remove the battery holder and note
your model number and date code before calling.
Accessories/replacement parts
To order, please call Honeywell Customer Care toll-free at
1-800-468-1502.
Battery holder ................................ Part No. 50007072-001
Cover plate assembly* ................... Part No. 50002883-001
*Use to cover marks left by old thermostats.
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