Honeywell Heating & Cooling - Recent Questions, Troubleshooting & Support

Do you mean the alert flag (a triangle with an exclamation inside it) or a different symbol? The Alert flag will appear with another message on the screen. If it is time to replace the battery, you'll also see "BATT" to the left of the flag and a low battery icon somewhere along the top of the LCD screen. If the thermostat is set to alert you to change the HVAC system filter regularly, you'll see "REPL" to the left of the alert flag.

This is from the T4 Pro thermostat manual on pages 6 and 7. See . The T6 Pro uses the same alert behavior.

I hope this helps.

Cindy Wells

Honeywell... | Answered 21 hours ago

You may or may not have the correct thermostat. You did state if you have heating and cooling. this a heat only.

Honeywell... | Answered on Nov 13, 2018

not finding a 153. open the cover, w2 or y2 means 2 stage, w or y is single stage

Honeywell... | Answered on Nov 12, 2018

On the Pro4000 model you hold the 2 arrows until you go into setup mode. Then arrow up ONLY til you get to option 13. The display will read 13 and 1, press the DOWN arrow and it will read 13 and 0. This turns off Adaptive Intelligent recovery. Now hold the 2 arrows til you see the normal display screen. You are done.

I just did this with a Honeywell tech rep on the phone.

Honeywell... | Answered on Nov 11, 2018

Love the honey well product. Probably has a blown fuse. May be in the plug portion of cord or in the fan itself.

Honeywell... | Answered on Nov 10, 2018

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Model # CT410B Internet #100574426 Store SKU #129002
Honeywell Manual Electric Baseboard Thermostat (123)
Questions & Answers (32)
  • Manual 4 Wire Premium Baseboard/Line Volt Thermostat
  • Compatible with 120, 240 and 277 vac baseboard heat systems
  • Simple dial-type mechanical control

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Store Details & Services Accessories (1) Product Overview
The easy-to-install Honeywell Manual Electric Baseboard Thermostat works on 4-wire (double pole) electric heat applications (baseboard or line volt) and allows for simple, worry-free operation. It has a simple dial-type mechanical control and is UL and CSA listed for safety.

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Heat Only
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1-UL Listed,CSA Listed
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Honeywell... | Answered on Nov 07, 2018

Check batteries for acid and clean terminals

Honeywell... | Answered on Nov 06, 2018

t gets capped and not used. b is your common, now goes to C. X2 is emergency heat, goes to E.

Honeywell... | Answered on Nov 04, 2018

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