Honeywell Heat/Cool Thermostat - Answered Questions & Fixed issues

Here's a link for a manual for a CT3200 programmable thermostat. https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-1631.pdf Here is a link to an earlier version (in case something was changed) https://www.manualowl.com/m/Honeywell/CT3200/Manual/133935?page=1

Connecting the voltmeter and getting a reading will cause no harm. Just make sure you have it set to read volts (AC or DC whichever is the case).

IT MAY BE THE THERMOSTAT MALFUNCTION.

Its probably not the thermostat. The air conditioner may be stuck on heating mode. If its a reverse cycle, the reversing valve may be jammed so even when the thermostat is calling for cold air, it stays on heat. If the machine is on heating mode, it should be blowing cold air out of the outdoor unit of the air con. If its on cooling mode, the outdoor should be blowing hot air.

Thermostats don't actually blow anything, the heating system might though. Check the breakers for your heat system, then call a heating specialist. They're really not that expensive.

You should be able to get this from any heating supply store or repair facility in your area.

Look here for the manual: http://www.honeywellconsumerstore.com/store/images/pdf/rth111b-vertical-digital-non-programmable-thermostat-installation-manual.pdf

https://customer.honeywell.com/resources/Techlit/TechLitDocuments/69-0000s/69-2761EFS.pdf here is link to online manual

foillow top big radiater hose. on the end going into the engine most likelyon top of the engine their is a domed shaped cover with bolts in it. unbolt the cover to reveal the thermostat.

Press the SYSTEM button to select Heat, Cool Off or Auto. Here is the manual. Check this link for more information on Honeywell thermostats

This thermostat is 24 volts A/C. Here is the operational manual and the install manual for the rth221b. For more information on thermostat power check this link.

Here is a link to the thermostat manual. For information on how to install a thermostat check out this link

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first of all it is not a battery according to a HW tech., it is a capacitor that charges or stays charged by the current coming from the transformer on the boiler or furnace or on an a/c,etc...I know. it's an energizer # 2025 or sumptin' like that.That's if we're talking about a T87N or T87K, otherwise just pop open the lid and replace yer' batteries!

Hi,You have a problem.... two red wires....The white goes on the "W" terminalThe green goes on the "G" terminalNow... the red wires...One goes to the outdoor A/C unit and the other is the power coming from the transformer on the air handler or furnace...So, you need to figure out which wire has the 24v coming through it and hook that to the "R" terminal...Then hook the other wire... the one that goes to the Y in the furnace to the "Y" terminal on the t-stat...this will continue on to the outdoor unit....Becareful... if you hook the red wires up backwards you could blow the transformer or at least the fuse on the board if it has one...heatman101

Hi,
Tell me if I'm wrong... but you only have two wires going to this old t-stat....so... it really doesn't matter which wire goes where....place one on the "R" terminal and one on the "W" of the new thermostat...

heatman101

Hi,
Looks like you should have the wires hooked correctly....
When the t-stat calls for cooling you should have 24v ac on the Y terminal... this should feed through to the outdoor condenser and turn on the compressor....

It is possible that you have a bad t-stat... and I also assume that you have turned the t-stat to the cool setting.

You also should check the air handler wiring to make sure that the wiring is the same there...you should have matching terminals and the same wire colors should be matched up there...

heatman101

as lower the number the cooler it is

It helps to know which wires went to the terminals on the old thermostat, if it had one. Otherwise, you would really need to know how they are hooked up inside the furnace/air handler. Some technicians hook them up differently, but I can give you the basics and most commonly used wires. R terminal- red/power wire G terminal- green/ fan wire Y terminal- yellow/ cooling or condenser wire W terminal- white/ heating wire C terminal- blue/black/ common or ground wire If you have a rc/rh terminal, they are usually jumpered with a small wire and your power wire still hooks to that. Hope this helps and good luck!

You have either blown the fuse on the circuit board on the furnace, which will be a 3 or 4 amp fuse, or you have shorted the transformer inside the furnace which will be a small square component with a round coil that will have 4 or more wires. If you follow the 120v in the furnace, it will be there. You can pick these up at local supply stores and some home improvement stores. It should be 120/24 volts. In some cases it blows both fuse and transformer, but I would start with the fuse if you have a control board on the furnace. Everything will be located inside the electrical panel on the unit. If I knew what unit you had, I could be more specific. Hope this helps and good luck!