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I have installed this thermostat RTH 6400 according to instructions. On the day program (72 degrees) It stops and restarts the heating system almost every minute. Any way to adjust sensitivity ?

Wiring installed and double checked. 4 wires installed : G-W-Y-RH Advanced settings modifed to fit electric heating with cooling unit (compressor).

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Posted on Jan 02, 2017

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refritech08
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SOURCE: air conditioning unit not cooling

the problem sounds like a defective capacitor its located on the condensing unit outside, also a contactor that is used can be defective also.

Posted on Jun 15, 2008

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SOURCE: Furnace doesn't reach desired temperature

One of two things you can try. Do you own a volt ohm meter? Anytime your unit cycles short like it is doing the control circuit which on this one is 24 volts that engages relays and controls the gas valve to open and close. I am thinking the heat exchanger is getting so hot it is tripping the upper limit which for the most part is around 180 degrees. So next time it turns off take your ohm meter and with the power to the whole unit off. Either turn the breaker off or there is a light switch that is real close to unit turn it off. Undo the two wires to the gas valve and ohm them out. You should have continuity if you get nothing check each limit switch should have a couple. Undo wires to them and check. If you find one that is open more then likely the upper one. They are a safety device that keeps the unit from getting too hot.

There might be another option increase the speed of your fan motor to get the heat out of furnace quicker. Look at the circuit board notice the fan wiring going to it. The Red wire from fan is low speed look to see if it is on HEAT on the board. You should have 4 speeds to pick from you could take the black off of COOL and swap wires and test the unit by doing that. I'm going to put a solution on this so I can come back to it quicker. Even though we a just testing it for now. ken

Posted on Dec 21, 2008

  • 252 Answers

SOURCE: need help programing a honeywell thermostat T8095A1002

Go Here: http://yourhome.honeywell.com/Consumer/Cultures/en-US/Support/Thermostat+Wizard/

Posted on Apr 10, 2009

  • 24 Answers

SOURCE: Honeywell RTH 230B Thermostat Wiring

put the jumper back in RC and RH and that should do it.

Posted on Apr 15, 2009

  • 587 Answers

SOURCE: RV air conditioner. Compressor running, fan stops before cool

The fan motor is getting hot and going off on the internal overload in the motor.
This is caused by either a low voltage, a bad capacitor, or tight or dry bearings in the motor.
To check the bearings turn the power off to the unit, then spin the fan blade if it spins freely then the bearings are ok.
To check the capacitor you will need some kind of tester or you can buy a capacitor and replace it, that's what a lot of people do. They usually don't cost very much.
To check the voltage you will need a voltmeter and measure the volts at the unit.

Posted on Jun 09, 2009

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How do you program the Honeywell RTH 2410B1019 thermostat for a heat pump.


5-1-1 Day Programmable Thermostat - Honeywell

yourhome.honeywell.com/.../thermostat/5-1-1-day-programm...

HoneywellSet the Honeywell 5-1-1 day programmable thermostat to your maximum comfort settings. Works with heat pump systems. Buy now!

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Overlapping time periods can cause a lot of trouble. Removing the battery's will erase any programming that may have been done before now. The factory program is just for basic operation and they don't normally have any schedules or operational customer programs in them. The factory program will not be affected by removing the battery's. It's also much easier to do all this while sitting at a table and not hunched over at the wall. Remove the old battery's and replace them with new ones. The battery's are used to store your programming so be sure to put good battery's back in before starting. I will change this to use the word "Program" in place of the word "PERIOD" that I am most familiar with. Its a little complicated, but I think it will solve your problem. --------->One "SCHEDULE" covers a 24 hour block of time or One Day. Each block of time in the schedule from a "start time" to a "stop or temperature change time" is one "PROGRAM" in the "SCHEDULE". Here is an example of how to program one complete "SCHEDULE", (One day of 24 hours) Containing 4 Programs . ----- Get a large piece of paper and write down EXACTLY what you want your thermostat to do in ONE, 24 hour day. THE EXAMPLE> ----- You want your furnace to start at 5:00 AM and warm the house to 72 degrees by 5;30 when you get up. Write down "72 degrees from 5;00 AM to 6;30 AM", or when you expect to leave the house. Then write down "62 degrees from 6;30 AM to 4;00 PM" or 30 minutes before you expect to be home. Then write down "72 degrees from 4;00 PM to 10;30 PM" or when you expect to go to bed. Then write "62 degrees from 10;30 PM to 5;00 AM" or 30 minutes before you expect to get up.-----< You have just covered a 24 hour period of time using 4 Programs and created ONE "SCHEDULE". Each day of the week needs a schedule. Various thermostats are different in how they handle schedules. You will need to read your "Owners Manual" to find how your thermostat arranges its schedules. To get started, look for a "SET" button or touch sensitive area on the display screen. If there is no SET button you can see, check your manual for the button to press to put the thermostat in its programming mode. With some thermostats, the display will blink or change color to let you know you are programming. While in this mode, use the temperature set point arrows ( up and down) to scroll through all the different things that can be set ( Programmed ). When you hit one you are looking for, press the left and right arrows or buttons to set that function or time where you want it. Press the up and down arrows to get to the next adjustment, use the left and right arrows or buttons as before to set that function. Keep doing this until you have gone through all the various functions and set points for one 24 hour day. DOUBLE CHECK all your times and temperature changes against the desired operation you wrote down. Be extra careful none of your start and stop times for the temperature resets overlap each other. If you programmed in Holidays or special events you may have, be sure the TIME and DATE are correct. Press the "RUN" or "START" button to lock it all in and start your programs running. Again, be careful of overlapping the times in each "PROGRAM" of each daily "SCHEDULE". Overlapping times can keep your system running all the time, starting and stopping or changing temperatures, or maybe even not run at all. I hope all this will help you to better understand these complicated devices called thermostats. Thermostats are a deep subject and specific factory information in your owners manual may be needed to get you through. I hope this helps though. At least a little. The main trick to getting them right is to write it down before starting and make sure it covers a 24 hour day. Again, be extra careful of overlapping times from program to program and you should be OK. Good Luck. Roger.

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