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Question posted by dlknol on December 31st, 2021

How To Unlock Rth8500 Honeywell

by mistake i locket my RTH8500 THERMOSTATE. i don't know how to unlock because I don't have a pin. I use 1234 pin but is incorrect. please help.thank you dora

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Answer #1: Posted by SonuKumar on January 1st, 2022 8:28 AM

SonuKumar

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To unlock your RTH8500 Wi-Fi Series or TH8000 Series thermostats, follow these steps:

Hold down System and Auto with two fingers on your display.

Press and hold the blank lower center button, until the display changes. ...

Change the left values to 0670 using the up/down buttons in the middle of the display.

https://www.smarthomeperfected.com/how-to-lock-unlock-a-honeywell-thermostat/

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Related Honeywell RTH8500 Manual Pages

Owner's Manual - Page 1

Operating Manual RTH8500 Touchscreen Programmable Thermostat 69-1901EF-1

Owner's Manual - Page 2

...Never use sharp instruments, such as a pencil or pen, to the thermostat, always press keys with this product please visit http://yourhome.honeywell.com or call Honeywell Customer ...to press touchscreen keys. This thermostat contains a Lithium battery which may apply, See www.dtsc.ca.gov/hazardouswaste/perchlorate Need Help? Copyright © 2007 Honeywell International Inc. For assistance ...

Owner's Manual - Page 3

CAUTION: EQUIPMENT DAMAGE HAZARD. Table of contents RTH8500 About your new thermostat Thermostat features 2 Programming at a glance 3 Quick reference to controls 4 Quick reference to status display......... 5 Programming & Operation Clock setting 6 Fan setting 7 System setting 8 Using program schedules 9 Program schedule overrides 12 Vacation hold 14 Special features 15 Screen ...

Owner's Manual - Page 4

.... • EnergyStar® compliant to greatly reduce your new thermostat Congratulations! It has been designed to -use thermostat. Features • 7-day program schedules maximize comfort and economy. • Armchair programming: Just pull thermostat from the wall to set . • Change/check reminders let you know when to replace filters and batteries. • Large touchscreen display...

Owner's Manual - Page 5

AThbiosutthyeorumronsetawt tisherremadoysttaot go . RTH8500 Your new thermostat is set the time and day. Set clock...See page 6 2. Program schedules: Preset to energy-saving levels while you're at work or asleep (assumes ...

Owner's Manual - Page 7

Quick reference to status display Current inside temperature Current day of week RTH8500 Temperature setting Fan setting System setting Current time WED 70 FAN Inside AUTO SYSTEM HEAT 6:01 AM 70 Set To Following Schedule Recovery Program schedule ...

Owner's Manual - Page 9

Fan setting WED 70 FAN Inside AUTO SYSTEM HEAT 6:01 AM 70 Set To Following Schedule SCHED HOLD CLOCK SCREEN MORE Press FAN RTH8500 Press FAN to select fan operation, then press DONE. • On: Fan is always on. • Auto: Fan runs only when the heating or cooling system is on.

Owner's Manual - Page 10

... not appear, depending on the indoor temperature. • Off: Heating and cooling systems are off. • Em Heat (only for heat pumps with auxiliary heat): Thermostat controls Emergency and Auxiliary Heat. Press the SYSTEM button to select, then press DONE. • Heat...

Owner's Manual - Page 11

... you return home and the temperature you want during the evening, until you want during the morning, until bedtime. Save money by setting program schedules RTH8500 It's easy to program your system for weekdays and weekends.

Owner's Manual - Page 12

... settings, since they can reduce your heating/cooling expenses by as much as 33%. (See next page to use EnergyStar® program settings. Operating Manual EnergyStar® settings for maximum cost savings This thermostat is pre-set to adjust times and temperatures of each time period.) Wake (6:00 am) Leave (8:00 am...

Owner's Manual - Page 13

... and Cool temperature for program period to eliminate any unwanted time period. 70 FAN Inside AUTO 70 Set To To adjuWsEDt program Following Schedule schedules RTH8500 67:000 FAN Inside AM PrAeUTsOs SCHED 70 Set To SCHED HOLD CLOCK SCREFESNoclhloewdMuiOnleRgE 6:00 Press EDIT AM DONE EDIT WAKE LEAVE RETURN SLEEP CANCEL...

Owner's Manual - Page 15

... press CANCEL (or SCHED) to cancel "Hold" and resume the program schedule. Press CANCEL (or SCHED) to permanently adjust the temperature. Program schedule override (permanent) RTH8500 Press HOLD Adjust temperature WED 70 FAN Inside AUTO SYSTEM 73 Set To Heat On HEAT 8:00 AM Permanent Hold SCHED HOLD CLOCK SCREEN MORE...

Owner's Manual - Page 17

...and cool settings must be at 6. Special features RTH8500 Smart Response® Technology: This feature allows the thermostat to "learn" how long the furnace and air... feature is set . When the system is used in climates where both air conditioning and heating are used on before 6 am , and the temperature to Auto, the thermostat automatically selects heating or cooling depending on screen....

Owner's Manual - Page 18

... or household glass cleaner. Avoid abrasive cleansers. 16 Spray liquids onto a cloth, then use the damp cloth to resume normal operation, or press SCREEN again if you can clean the screen without changing any liquid directly on the thermostat. Operating Manual WED 70 70 ASFAcbN roIenusideetnyoculeranneSieSntCwTRoEgENtLOhCKEeD rmostat AUTO Press SCREEN 6:00PM Following...

Owner's Manual - Page 19

...: 1. Press s or t to replace your filter. To change reminder interval. Press MORE, then EDIT. 2. Furnace filter reminder Press RESET afWteEDr changing filter. Filter 60 Days RTH8500 If activated during installation, the furnace filter reminder alerts you when it is time to select the desired interval, then press DONE. 3. Press RESET after...

Owner's Manual - Page 20

... a month. Even if the warning does not appear, you should replace batteries once a year, or before batteries are optional (to provide backup power) if your thermostat was wired to run on AC power when installed. Install fresh batteries immediately when the LO BATT warning begins flashing. Insert 3 fresh AAA alkaline batteries...

Owner's Manual - Page 21

... closed securely. • If thermostat is activated (see page 18). Display is blank • Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on lower • This button will remain blank unless the furnace filter change right of difficulty RTH8500 If you have difficulty...

Owner's Manual - Page 23

... under normal use and service, for a period of one (1) year from which you purchased it; If at any questions concerning this limitation may not apply to you. HONEYWELL SHALL NOT ...WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. 1-year limited warranty RTH8500 Honeywell warrants this product, excluding battery, to be free from defects in the possession of a ...

Owner's Manual - Page 24

... 69-1901EF-1 Rev. on recycled paper containing at least 10% post-consumer paper fibers. ® U.S. Automation and Control Systems Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Toronto, Ontario M1V 4Z9 http://yourhome.honeywell.com Printed in U.S.A. US Patent No. 6595430, D520,386;

Owner's Manual - Page 25