Question about Honeywell Programmable Thermostat Heater

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Honeywell Thermostat power light

I have a Honeywell thermostat (10/12 years old?). The green power light
went out along with all the digital readouts. I replaced the batteries and all the digital readouts came back but no power light. I checked the main breaker and all the breakers are on. The AC is not responding to the thermostat. Any idea what can be wrong?

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I just had this happen to me a few days ago. I hope you find this response before you did what I did and paid an AC guy $103 for him to do about 5 minutes worth of work. Here goes.

The power is shutting off because your drip line is clogged. Your drip line is the tubing that goes from your compressor (inside) to the outside of your house. When that tube gets clogged up (with algae and dirt) then the water will backup in the line. There is a protection circuit in the line and when it detects water (because of a backup) then it shuts all power to the AC off. If you take a shop vac outside and **** all the **** out then you'll be fine. The AC guy said that when I replace my filter every month that I need to pour about 1/2 cup of bleach in the line (from the inside) to prevent algae from forming and stopping the pipe up. Hope this helps someone out there before it costs them a $100.

Posted on Jun 11, 2009

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Have the batteries been replaced? May need to be.

Posted on Jun 01, 2009

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dorothyslaug
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SOURCE: The middle of the touchscreen of my Honeywell

it not a touch screen, its manual old style honeywell, square box, not round, not rectanglur.

Posted on Nov 03, 2013

Testimonial: "It is a touchscreen. I have seen references to the battery being round and lithium CR2450; however, not sure if this is accurate. Does anyone know?"

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1 Answer

Digital thermostat Honeywell RTH 2300 - compressor runs when in heat mode


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Tip

Programmable Honeywell


A Programmable Honeywell Thermostat is a great investment for you to make for your heating and cooling system. A Honeywell Thermostat will provide you with the best in comfort and dependability for many years.

Many people when they think of Honeywell Thermostats think of the old round T87 thermostat that has been one of the most common thermostats for years and years.

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Today they have those thermostats in designer colors and they are still made and used in many situations. But the manual thermostat is quickly becoming a thing of the past. With the rising costs of fuel the Programmable Honeywell Thermostat is becoming more and more popular. Programmable Thermostat Honeywell is even one of the most popular searches when it comes to thermostats.

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The VisionPro thermostat line has quickly become one of the leading digital programmable thermostats on the market to today. The ease of programming this thermostat and the touch screen interface has made it a very popular choice for many people. There is a variation of this thermostat for virtually any possibility that you can think of. The FocusPro line also is a very good choice at a bit less cost. There is a basic Pro line and also even a digital thermostat in the traditional round configuration. Both digital programmable and basic digital thermostats are available for line voltage control of electric heating.

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Along with the thermostats you now are able to add remote outdoor sensors as well as install you thermostat in a remote place and run a sensor to the space you are controlling. For many years these capabilities were standard for commercial thermostats, but now they are a very real possibility for home use also. With an outdoor sensor these thermostats now have the capability to turn off your heat pump and start you backup heat a certain preset out door temperature. In the past many systems have been installed with complicated electronic to do what a thermostat can do very easily.

The Programmable Honeywell Thermostat has come a long ways in the past few years. The changes have made this thermostat capable of doing many unbelievable things. If you are looking to replace your old thermostat, carefully compare the many thermostats on the market and then pick the one that will meet your needs the best. For many the Honeywell digital thermostat will be the best choice, giving them great flexibility and reliability in one thermostat.

http://www.fixya.com/support/r3894275-manual_honeywell_find_honeywell_manuals

http://www.fixya.com/support/r3623083-thermostat_wiring_terminal_designations

on Jan 15, 2010 | Heating & Cooling

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Wiring with new Honeywell thermostat


You need to put battery in the new thermostat if you gonna leave the C terminal disconnected

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I am replacing a 10 year old Honeywell Thermostat with a mercury switch with a new programable digital Honeywell OS#RTH7500D1007 MD 0638. There a 4 wires coming out of the wall and are installed on the old...


You are on the right track, you can hook the same 4 wires to the new thermostat without the jumper you had on the old thermostat. The jumper wire that is on the new thermostat can stay with no problems. Just connect the wires to the same terminals on the new one and your good to go!

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How do i change an old style honeywell room stat


Shut the furnace off for starters. Remove the old Thermostat. As you remove each wire write down what terminal it wen to.

Example:
Red wire usually goes to R-Power
Green Wire usually goes to G-Fan
White usually goes to W-Heat
Blue or Yellow usually goes to Y-Cool

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How can I tell if the thermostat is broken or not?


Before going to electrical components ,please firstly check the power supply ,then the electrical wire to the heater and so on .

Oct 04, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Wiring


red goes to RC and RH, White goes to W, Green goes to G and Blue goes to Y. iam assuming on the old tstat that Red whent to R White went to W Green went to G and Blue went to Y

Sep 20, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

I have the same problem.


transformer going bad or bad connection check for 24v ac from red to common batteries only for mem storage and if no common used at stat to hold program red to g fan red to y comp

Jun 09, 2009 | Honeywell Programmable Thermostat Heater

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Blower not working with new thermostat


To get the fan to work, look at the heating system to see what termoinal the blue wire is connected to. It should be the "G" terminal. If so, connect the blue wire to the "G" terminal on the thermostat and then manualy switch the thermostat to "Fan On". Indicate what terminals you have on your new thermonsta ie "G" "R" "Y" "C" "W" etc... For a fan to work, typically you connect "R" to "G" on the furnace.

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