Honeywell L4064B2236 Fan/Limit Control Heater - Page 5 - Answered Questions & Fixed issues

Expose the wires and carefully put the yellow wire in with the red. See if outdoor unit kicks on.

Honeywell... | Answered on Jul 28, 2019 | 63 views

try this web site for your manual. I think this is what you are looking for.

Honeywell... | Answered on Jul 14, 2019 | 210 views

I have not seen this issue and the manual gives you the option of either off or dim to high upon key depress.
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.

Honeywell... | Answered on Jul 14, 2019 | 353 views

Without seeing the wiring diagram, I can only say that the MV/PV terminal in many cases is used as the common from the thermostat/transformer. Usually, the 24 volts is supplied to the thermostat from a step down transformer and the thermostat sends voltage to the controller. I would hesitate to "guess" at this without a complete understanding of the wiring requirements. Any HVAC tech should be able to help you.

Honeywell... | Answered on Jul 14, 2019 | 63 views

It has been my experience that the screen is damaged. You will most likely have to replace the thermostat. I have seen where heavy scratches will cause this condition.

Honeywell... | Answered on Jul 14, 2019 | 87 views

So if the temp changes what are you wanting to change? I'm confused.

Honeywell... | Answered on Jul 10, 2019 | 54 views

Typically the box will say "C wire required " Any 24v tstat will work, just make sure it doesn't say c required.

Honeywell... | Answered on Jul 06, 2019 | 103 views

What's the model of your outdoor unit.

Honeywell... | Answered on Jul 03, 2019 | 38 views

When you turn power on/off your resetting the entire system. The problem is your air handling unit or outdoor unit. Something is locking out the system. Would need model number outdoor unit/indoor unit.
What breaker are you resetting? For what unit.

Honeywell... | Answered on Jun 18, 2019 | 38 views

Help how do I unlock this?

Honeywell... | Answered on Jun 14, 2019 | 4,551 views

And if what jumptrout51 said does not work, remove the thermostat to expose the wiring and place a jumper between (R) and (Y).

Honeywell... | Answered on May 27, 2019 | 184 views

likely have a tripped float switch from a backed up drain line

Honeywell... | Answered on May 18, 2019 | 111 views

It seems like since it's battery operated, you can still use the three wires only. R, G, and Y, and set thermostat jumpers or program accordingly.
The batteries will operate relays, LCD screen, but if I'm wrong, then the C terminal would need to be used both at the unit and thermostat to power the thermostat with 24 volts, not likely, just use one of the spare wires you mentioned or preferably the black wire.

Honeywell... | Answered on May 16, 2019 | 35 views

Use the r and w points for heat only. If it is a digital thermostat without a battery you may need to put a resistor between the w and c on the furnace to allow the thermostat to work properly. Your manual should tell you what value resistor.

Honeywell... | Answered on May 13, 2019 | 23 views

You may need to set the thermostat to energize or de-energize the reversing valve. Essentially you possibly have it in heat mode. Or you wired it to energize emergency heat strips.

Honeywell... | Answered on May 13, 2019 | 261 views

You most likely setup the thermostat for something besides heat pump function. What is the model number for the Honeywell thermostat and Coleman unit?

Honeywell... | Answered on May 02, 2019 | 28 views

What is model of the Thermostat

2-fywiog52uc2ssdn5xk2mhim4-2-2.jpg Did you check the Circuit Breakers to make certain you have not simply tripped a breaker?

In general, depending on where you live: If you will need Heat select Heat then set the desired Temperature
If you will need Cooling select Cool and then set the desired Temperature.
Fan should be set on Auto.

Honeywell... | Answered on Apr 28, 2019 | 32 views

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