20 Most Recent Honeywell RTH230B 5-2 Day Programmable Thermostat Large - Page 4 Questions & Answers

I just dealt with this problem today. Put new batteries in and still blank but then I noticed that there was acid buildup on the negative connection for the batteries so I cleaned it off with a toothbrush and lemon juice. It fixed the problem

Four screws in the back, take them out to open unit. At the very top is a circuit board, tale the four screws out of that and carefully take circuit board out. You will see the tip over sensor (TOS). Flip board over to find the little metal ball for it, solder that metal ball to the one next to it.

notify honeywell

Thermopile should read 600 millivolts Thermostat has to be millivolts . .

Get the common hooked up on both indoor unit and tstat and be done with batteries all together!!!

This was our first home in 2014, built un1981. Not sure when KozyHeat was installed. but since when within the last few days the remote and local seemed to disconnect completely. We tried several dozen times about the gas local to remote to pushing the flame button, all to no avail. Is it the transmitter? Is it the remote? Is it something else? We live in Northern Albrta, so it has been a little tricky to keep the heat in the house consistant. Please reply with good news. A replacement or repair or anything?? Thank yoy!

air condition

If the board isn’t shorted out then a damper or tstat is. I would first take a pic of all the wiring, turn power off and remove all damper wires. Turn power on and see if you get any lights. If yes then you can eliminate one damper at a time to find problem. If no lights, turn power off, remove remaining wires other than the transformer wire that provides power to board and then power on. If you get lights then you likely have a tstat issue. If still no lights you have a bad zone panel.

Likely don’t have the common hooked up inside unit.

These small wine coolers are problamatical. Contact them direct. https://www.manualslib.com/manual/69562/Honeywell-88065.html?page=12#manual ..

Replace the battery. The Triangle and exclamation point mean the battery is in need of replacement.

There are other universal replacements but if it was me I would stick with the honeywell parts. I know they are more expensive but in your instance where you already have a problem that is causing the control panels to fail I'm afraid you would make it worse by using other then factory replacements.Thank you

Yes it is.

Ok…do it.

lots of information here. Programmable and even wifi controlled. https://www.google.com/search?q=upgrade+honeywell+thermostat ..

The hermostat is a switch contact that works n the selected temperature, nothing more elaborate. For a wireless thermostat, all you need is power fr the receiver and the cntact connection. The thermostat transmitter works on battery power.

Off position then reverse batteries polarities and wait 5 sec. Then place new batteries back to normal position.

I have not seen this issue and the manual gives you the option of either off or dim to high upon key depress. Manual: 0280 Backlight 0 Backlight on for approx. 8 seconds after keypress 1 Backlight always on low intensity, full bright after keypress (requires 24VAC connection). I am sorry I can not offer any further info.

With brush and a vac on suck or blow if its just dust . if its grease wd40 and rag to wipe it down

show us a photo of it good close-up if possible