20 Most Recent Honeywell TH4210D1005 Heater - Page 7 Questions & Answers

I would connect to R and W. If any questions call support 1-800-468-1502 https://www.manualslib.com/manual/1072917/Honeywell-Rth2510.html#manual

Either motor or fan switch is bad

don't know but honeywell technical support may know https://www.honeywellstore.com/customer-service/contact-us.htm check if it has a safety switch in the base as it may not be making contact with the surface the fan is sitting on. It has a timer maybe cause ? if not in usa then go to honeywell in your country and then look for help at bottom of web site.

https://www.youtube.com/watch?v=RtgN-tM9Al0

Robert Shaw 9500 manual

get in a repair person and send the bill to the land lord. He has no legal right to interfere in your operation of your equipment

There is a battery inside the thermostat. No one seems to know about this battery. If the battery is dead thermostat won't work. Pop thermostat apart, test battery and replace.battery. I am not 100% sure this is your problem, for your thermostat, but I have come across this problem before. Good Luck Friend.

To change to F to C follow the next steps: 1. Press and hold and the same time (simultaneously) the up arrow and fan button (middle button under the screen) until the display changes. 2. Press next until you see 14 on the left and 0 on the right. 3. When you see the 14 on the left and the 0 on the right, press up arrow to change number 0 for a 1. 4. Then press Done and you will see your normal display in Celcius. Good luck!

What type of system do you have? If you have a heat pump with a reversing valve you will need to set the thermostat settings for a heat pump. Or it can also be the wiring. Check your setting on the thermostat.

The TH8320U1016 thermostat has 2 terminal pins "S1 and S2" that are the ones that are connected to your outdoor sensor, but the TH9320WF003 it doesn't have the "S1 and S2" terminal pins, so I would recommend you the TH6320WF2003 this thermostat is compatible with all system types and with outdoor sensors terminal pins "S1 and S2".

Did you set the minimum and maximum settings on the thermostat? When they come new the settings are set to about the same temperature. One must set the upper and lower temperatures manually.... Regards Geoff

https://www.manualslib.com/manual/576182/Honeywell-Th2110dv.html?page=5#manual

Pop the front cover off.

Is there power to the unit?

https://www.askmehelpdesk.com/advice/t-52979.html

Check the voltage coming off the thermopile it should be 600mille volts .

On a Honeywell thermostat the flashing means that the system is in a delay to turn on the compressor. This is used to protect the compressor from coming on and off too often. The normal delay is about 5 minutes. After that the system should come on. If not there is s problem.In order to help us help you we will need a little more information. What happens either at the inside unit or at the outside unit after the thermostat stops flashing "Cool"? Any fans come on? Do you hear a "KLUNK"? Any sparks? Please let us know so we can help.

Thermostats have multiple issues when you start checking them against thermometers. 1) the built-in thermometer may not match the set temperature because one or both need calibration. Compare the built-in to an external thermometer and see if there is any adjustment to make them match. Record the setting on the thermostat and the temperature when it starts and stops -- there should be a 1-3 degree range which may be adjustable. The set point should be in the middle of the on-off temperature spread. 2) the thermostat has a heat anticipator setting which may be set poorly -- turning off the heat before it reaches the set point - the fan normally runs for 1-2 minutes after the heat source is off. The anticipator is used to stop heating before reaching the set point as there are still a lot of BTUs coming out during the fan run-down -- usually 1-2 minutes.

https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-2229ES.pdf

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