Home » Honeywell » Thermostats » Honeywell RTH4300B

Honeywell RTH4300B Support Question

Find answers below for this question about Honeywell RTH4300B.
Need a Honeywell RTH4300B manual? We have 1 online manual for this item!

Honeywell Overview Questions Manuals Reviews Videos Research

Question posted by smeredithstults on December 9th, 2012

Heat Not Going Over 20 Degrees C

HI, I rent the top floor of a house where there is a RTH4300B thermostat. For the past few weeks the heat willnot go over 20 degrees celsius no matter what the thermostat is set to. Is there something we can do? Thanks

I Know the Answer!

I have the same question
Request More Information

Current Answers

There are currently no answers that have been posted for this question.
Be the first to post an answer!

Remember that you can earn up to 1,100 points for every answer you submit. The better the quality of your answer, the better chance it has to be accepted.

Related Honeywell RTH4300B Manual Pages

Owner's Manual - Page 1

RTH4300B Programmable Thermostat Operating Manual 69-1771EFS

Owner's Manual - Page 2

... cooling system when outdoor temperature is below 50°F (10°C). Registered Trademark. All rights reserved. Need Help? This manual covers the following model: RTH4300B: For 1 Heat/1 Cool systems CAUTION: EQUIPMENT DAMAGE HAZARD. For assistance with this product please visit http://yourhome.honeywell.com or call Honeywell Customer Care toll-free at...

Owner's Manual - Page 3

Your new thermostat is ready to go . Table of contents About your new thermostat Thermostat features 2 Quick reference to controls 3 Quick reference to display 4 Programming & Operation Set time and day 5 Select system setting 6 Select fan setting 7 Using program schedules 8 Program schedule overrides 11 Compressor protection 13 RTH4300B Programmable Thermostat Appendices Battery ...

Owner's Manual - Page 4

... programmable weekday/weekend schedules. • One-touch temp control overrides program schedule at any time. • Energy Star® compliant to greatly reduce your new thermostat Your new Honeywell thermostat has been designed to give you many years of reliable service and easy-to read. • Displays both room temperature and temperature...

Owner's Manual - Page 5

... 10-12) Fan Switch (see page 6) • Cool: Cooling system control. • Off: All systems off. • Heat: Heating system control. Auto: Fan runs only when heating or cooling system is on. RTH4300B Programmable Thermostat • Set: Press to set time/day/ schedule. • Hold: Press to override programmed temperature control. • Run: Press to resume program...

Owner's Manual - Page 6

... battery warning (see page 14) Replace Batt Current inside temperature Inside 75 Current program period Wake/Leave/Return/Sleep (see pages 8-9) Wake Wed 6:30 AM Set To 75 Heat On Current day/time (see page 5) Temperature setting (see pages 10-12) System status Cool on: Cooling system is on...

Owner's Manual - Page 7

... day. Note: If the display flashes Set Clock, the thermostat will follow your settings for the weekday "Wake" time period until you reset the time and day. Set Day 1. ASebtoutht eyotiumr eneawndthdearymostat RTH4300B Programmable Thermostat Press SET, then adjust time. Press the SET button, then press s or t to select the day of the week. 3. Press RUN to save & exit...

Owner's Manual - Page 8

...: Cooling system control. • Off: All systems are off. • Heat: Heating system control. CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not operate cooling system when outdoor temperature is below 50°F (10°C). Operating Manual ASebloeuctt ytohuersnyetswtetmhesrmetotisntgat The SYSTEM switch can be set to control the heating or cooling system.

Owner's Manual - Page 9

... to Auto or On. Use this setting for improved air circulation, or for more efficient air cleaning. In "Auto" mode (the most commonly used setting), the fan runs only when the heating or cooling system is on. ASebloeuctt ytohuerfnanewsetthteinrmg ostat RTH4300B Programmable Thermostat Set the FAN switch to choose whether the fan runs continuously or only...

Owner's Manual - Page 10

...until bedtime. You can program four time periods each day, with different settings for maximum energy savings. LEAVE 8:00 am 70 ° Set to bed and the temperature you are away (usually an energy-saving... It's easy to program your system for weekdays and weekends. WAKE 6:00 am 62 ° Set to the time you leave home and the temperature you want while you want during the evening, ...

Owner's Manual - Page 11

... next page to use EnergyStar® program settings. RTH4300B Programmable Thermostat AEnbeorugtyySotuarr®nseewtttinhgesrmfoorstmataximum cost savings This thermostat is pre-set to adjust times and temperatures of each time period.) Wake (6:00 am) Leave (8:00 am) Return (6:00 pm) Sleep (10:00 pm) Heat (Mon-Fri) Cool (Mon-Fri) Heat (Sat-Sun) Cool (Sat-Sun) 70 °...

Owner's Manual - Page 12

... this time period, then press SET. 4. Press s or t to program (Heat or Cool). Press SET until Set Schedule is set to the system you want to set desired temperature. Note: Make sure the thermostat is displayed. 2. Set To 75 Set Schedule 6:30 AM Heat Wake MonTueWedThuFri 1. Set To 75 Set Schedule 6:30 AM Heat Wake MonTueWedThuFri Press SET, then set the temperature for the next...

Owner's Manual - Page 13

... the thermostat is set to turn up the heat early in the morning, it will automatically be maintained only until the next programmed time period begins (see page 8). This will be lowered later, when you want to the system you leave for the current time period. RTH4300B Programmable Thermostat APrboogurtaymousrchnedwutleheorvmeorrsidtaet (temporary) Press to control (heat or...

Owner's Manual - Page 14

... you manually change it, or press RUN to control (heat or cool). 12 Whatever temperature you set to the system you want to cancel "Hold" and resume the program schedule. Note: Make sure the thermostat is set will override the temperature settings for all time periods. Set To 75 6:30 AM Press HOLD to permanently adjust...

Owner's Manual - Page 15

... will flash the message Cool On (or Heat On if you have a heat pump). When the safe wait time has elapsed, the message stops flashing and the compressor turns on. 13 This feature helps prevent damage to wait 5 minutes before restarting. ABbuoiltu-tinyocuormnperwestshoerrpmrostetacttion RTH4300B Programmable Thermostat Inside Set To 75 75 6:30 AM Wake Wed...

Owner's Manual - Page 17

Most problems can be corrected quickly and easily. does not respond • Set system switch to Heat (see page 6). In case of difficulty RTH4300B Programmable Thermostat If you have difficulty with your thermostat, please try the following suggestions. Heating or • Set system switch to Cool (see page 14). Display is blank • Check circuit breaker and reset...

Owner's Manual - Page 18

... room temperature (see page 6). change • Cool: 50° to 99°F (10° to 32°C). "Heat On" is not • Set the System switch to Heat, and set to acceptable ranges: settings do not • Heat: 40° to 90°F (4.5° to 37°C). Operating Manual In case of difficulty Temperature Make sure...

Owner's Manual - Page 19

... call Honeywell Customer Care toll-free at 1-800-468-1502. Turn thermostat over to cover marks left by old thermostats. 17 For assistance with this product, please visit http://yourhome.honeywell.... model number and date code. ACbuosutotmyoeur ransseiwstathnecremostat RTH4300B Programmable Thermostat Pull at 1-800-468-1502. Or call Honeywell Customer Care toll-free at bottom to remove...

Owner's Manual - Page 21

... consequential damages, so this warranty, please write Honeywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502. 1-year limited warranty RTH4300B Programmable Thermostat INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT.

Owner's Manual - Page 22