Thermostat and HVAC

CNET: Yes, there's a specific temperature you should set your thermostat to in winter.
https://www.cnet.com/home/energy-and-utilities/yes-theres-a-specific-temperature-you-should-set-your-thermostat-to-in-winter/

Yes, there's a specific temperature you should set your thermostat to in winter Learn some tricks to save money on your heating bill, including the optimal thermostat setting.

High resolution multifunctional touch screen display thermostat

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I am replacing my thermostat. My old thermostat has W2 terminal, but my Honeywell RTH2300 has no W2 terminal.

Thermostat not compatible , as you evidently has a backup/emergency heat which is not supported by this thermostat. You would need RTH5160

My thermostat not cooling my house sufficiently

3 causes

1. System failure (measure the voltage of the wires normally 20-30 vac)
2. Utility Company remotely control your thermostat
3. Outside weather condition directly affect your thermostat

My Thermostat shows unlock at the bottom and nothing works.
Try the code:1234 (non-wifi thermostat)

Try : 1234+Date code (wifi thermostat)

Light went off/I took my thermostat off the wall,now it only shows flashing 4 digits (ie 2021).

The thermostat wants you to set the time and date. Keep pressing select/next to set the year, month, day and time.

THE BLUE WIRE TERMINAL IN HONEYWELL THERMOSTAT
Retail thermostat are powered by batteries, no blue wires needed, but Trade thermostat do need blue wires

Simple But Advanced and Sophisticated

Simple Non-Programable Manual Thermostat

If you want something simple , mechanical and non programable

What a design and powerful function!

Have you tried this?

What do you know about these thermostats?

Thermostat and HVAC updated their business hours.

My programmed thermostat starts ahead of the programmed time and displays recovery. What's the problem/solution?

My Honeywell thermostat turns my system on an off at regular interval without stopping. What is the problem/ solution?

When your HVAC stop working what's the first thing you think about?

https://images.app.goo.gl/trQe6wyqEVMLHp9B8

Image: Nest lanza un termostato y cámaras de seguridad en España Found on Google from www.elperiodico.com

MY SYSTEM RUNS CONTINUOUSLY WITHOUT STOP.
The causes are issues from the system (70%), wiring (20%) and thermostat(10%)
Those caused by the heating and cooling system occurs when the unit continues to run after taking the thermostat off the wall and will requires the attention of HVAC professionals.
Those caused by the wiring maybe due to using the wrong thermostat or hooking up the wires wrongly , for example connecting the cooling wire(Y) to the heating terminal(w) instead of the cooling terminal will cause running of the AC.
The thermostat can cause the fan to run continuously if the fan switch is put to on, instead of auto.

BEFORE YOU CALL A TECHNICAL SUPPORT.
Have th following ready before calling a Thermostat technician for help:

1. Model number of the thermostat: This can be found at the back of the thermostat.
2. The Heating/Cooling units: Is it a heat pump, conventional, Gas Forced Air, Hot water Heater, Electric?.
3. Wiring: What are the wires and which terminals are they hooked to. Red-R, White-W, Blue-C, Yellow-W, Brown, Black etc
Bear in mind that we don´t follow color code as all wires can perfom the same function irrespective of colors

NOT KEEPING SETPOINT
My thermostat is not keeping a setpoint
1. Thermostat may be following a schedule and should be disabled
2. Thermostat my be affected by factors such as opened windows, heat or light from outside, coldness/warmness of the wall on which it is placed, airflow from outside.
3. Thermostat is put in an unsuitable location in the house.

ON AND OFF
The thermostat is making my system go on and off intermittently.

The default cycle rate need to be checked in the installer setup (ISU) to reduce the frequency

HOLD
My thermostat display temporary/permanent hold.

This means the schedules/programms on the thermostat are held up/ suspended. The thermostat is functioning manually and not following programms or schedules. This can be activated by pressing the hold buttons after setting the temperature in some thermostat or configured to do so in other thermostats.

UNLOCK
My thermostat displays unlock below and wouldn´t respond to touch.

The thermostat is locked and therefore requires a special code to unlock it. The generic code is 1234, however wifi thermostats requires different set of codes depending on the manufacture date known as date code.

BLUE WIRE
My Blue Wire has no slot/terminal in Honeywell thermostat.
If it is a retail thermostat (i.e the model number starts with RTH) then don´t connect the blue wire just tape it off, because the RTH Thermostats are battery operated and don´t need to be powered by the blue wire being connected to the C-terminal.
Trade (ie TH) thermostats have slots (ie C terminal) for the blue wire.

Troubleshooting :Blank Screen/ No Display

1. Reset Circuit breakers and power switches( in the basement/garage)
2. Make sure the furnace door is closed.
3. Replace the batteries with fresh new alkaline ones correctly
4. Replace the Batteries first backward and leave them for a minute and then correctly
5. Observed that the polarity is followed
6. Check if the Thermostat is under a warranty
7. Replace the thermostat