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Question posted by crayt77 on December 1st, 2011

I Have A Honeywell Thermostat Ct3600a4451 How Do You Get 'filter' To Stop Flashi

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Answer #1: Posted by quaff on December 1st, 2011 9:10 AM

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quaff

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First, try replacing the filter with a new one. Then, remove the old batteries and turn the power to the furnace off for about 30 minutes, put new batteries back in the thermostat and resume power. If this does not clear your problem, and new thermostat is likely needed.

Related Honeywell RTH6400 Manual Pages

Owner's Manual - Page 1

Quick Installation Guide RTH6400 Series Programmable Thermostat 69-2210EF-03

Owner's Manual - Page 2

Call 1-800-468-1502 for the most common system We are here to help. Installation is preset for wiring assistance before returning the thermostat to match your new thermostat to the store. 69-2210EF-03 ii It is Easy Label wires and remove your old thermostat Install and wire your new thermostat Set your heating/cooling system -

Owner's Manual - Page 4

2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached. Old thermostat Cover 69-2210EF-03 2 M28099 If so, see back cover for proper disposal instructions. Leave wallplate in place Is there a sealed tube containing mercury?

Owner's Manual - Page 6

Wallplate M28343 69-2210EF-03 4 Pull here to remove wallplate from New Thermostat Remove battery holder. 4 Separate Wallplate from new thermostat.

Owner's Manual - Page 7

5 Insert Quick Reference Card Insert quick reference card into slot in back of thermostat. M2834 Thermostat M28344 5 69-2210EF-03

Owner's Manual - Page 10

8 Install Batteries Install two AA alkaline batteries. Back of thermostat M28346 69-2210EF-03 8

Owner's Manual - Page 11

M28347 9 69-2210EF-03 9 Install Thermostat onto Wallplate Install thermostat onto the wallplate on the wall.

Owner's Manual - Page 13

... on multi-stage heat pump systems or 120/240 Volt systems. 11 69-2210EF-03 This thermostat works on 24 volt or 750 mV systems. It will NOT work on page 13 to match your thermostat to your system type. *Heat Pump-an air conditioner that provides cooling in the summer, and...

Owner's Manual - Page 15

Function 1 Setting 0 Done Next Press DONE to change settings. SETUP WIRING ASSISTANCE M28348 Press s or t to exit and save settings. RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). M28349 Press NEXT to advance to next function. 13 69-2210EF-03 TROUBLESHOOTING

Owner's Manual - Page 16

... or electric heating without central air conditioning. (Use this setting if you could turn the fan on and off with a fan switch on your old thermostat.) Press to display next function. When correct setting is selected, press NEXT to change setting.

Owner's Manual - Page 17

...). 1 Heating changeover valve: Use this setting if you connected a wire labeled "B" to the O/B W wire terminal (see page 21). M28351 15 69-2210EF-03 SETUP WIRING RTH6400 Function 2: Heat pump changeover valve Press the s or t button to select whether your changeover valve is selected, press NEXT to change setting.

Owner's Manual - Page 18

... setting if you have a gas or oil heating system (system controls fan operation). 1 Electric heat: Use this setting if you have an electric heating system (thermostat controls fan operation). SETUP WIRING Advanced Installation Guide Function 3: Heating fan control Press the s or t button to select your heating system and fan operation: NOTE...

Owner's Manual - Page 19

SETUP RTH6400 Function 5: Heating cycle rate Press the s or t button to select your heating system and optimize its operation: NOTE: If Function 5 does not appear, please turn ...

Owner's Manual - Page 23

Do not use . Wrap bare end of wire with electrical tape and do not match letters on the thermostat, check the chart below and connect to terminal as shown here (see page 6). RTH6400 Wiring If labels do not use C, X or B. SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to O/B W. Do not...

Owner's Manual - Page 24

... WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your heating equipment (see page 14). Display is set to match your to match your thermostat, please try the following suggestions. ASSISTANCE TROUBLESHOOTING 69-2210EF-03 22 Temperature Make sure heating and cooling settings do not temperatures are correctly installed (see...

Owner's Manual - Page 25

... respond temperature. • Press SYSTEM button to set system cooling system to the compressor. cool mode ASSISTANCE TROUBLESHOOTING 23 69-2210EF-03 SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set system to respond. Make sure the temperature does not is closed securely. • Wait 5 minutes for the...

Owner's Manual - Page 26

... in make sure it is set to match your cool mode heating and cooling equipment (see page 14). same time (or • Grasp and pull thermostat away heat does not from wallplate.

Owner's Manual - Page 27

Accessories/replacement parts To order, please call Honeywell Customer Care toll-free at 1-800-468-1502. WIRING ... No. 50002883-001 *Use to cover marks left by old thermostats. SETUP ACbuosutotmyoeur ransseiwsttahnecremostat RTH6400 For assistance with this product, please visit http://DIYthermostats.honeywell.com or call Honeywell Customer Care toll-free at 1-800-468-1502.

Owner's Manual - Page 28

...rights, and you may not apply to you. In Canada, write Retail Products ON15-02H, Honeywell Limited/ Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V4Z9. 69-2210EF-03 26 This warranty does... ONE-YEAR DURATION OF THIS WARRANTY. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY...

Owner's Manual - Page 30

.... 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Toronto, Ontario M1V 4Z9 http://DIYthermostats.honeywell.com Printed in a sealed tube. D542,677 and other patents pending. © 2008 Honeywell International Inc. 69-2210EF-03 M.S. Contact your old thermostat in the trash if it contains mercury in U.S.A. CAUTION...