HVAC Fitter lists the FocusPro P200 Programmable, 1H/1C, Large Display Thermostat (Honeywell Home TH2110U4004) as a replacement for part number TH4110U2005.
The part that replaces it
FocusPro P200 Programmable, 1H/1C, Large Display Thermostat (Honeywell Home TH2110U4004)
- TH1010D2000
- TH1110D2009
- TH1110DH1003
- TH2110DH1002
- TH2210DH1000
- TH4110D1007
- TH4110U2005
- Use: Heat Pump. Compare with the label on your old part.
- Stages: 1 Heat/1 Cool. Compare with the label on your old part.
- Programming: 5-1-1 Day. Compare with the label on your old part.
What the thermostat does
A thermostat senses room temperature and turns your equipment on or off to keep your home comfortable. It acts as the switchboard for your comfort system, sending low-voltage commands to start heating, cooling, or the blower fan.
Most central home systems use a 24 V control signal sent from a transformer inside the furnace or air handler. Baseboard heaters use line voltage instead, so it is important to know which style your home uses.
Why this replacement fits
The Honeywell Home TH2110U4004 is listed as a direct replacement for part number TH4110U2005. It also replaces other numbers including TH1010D2000, TH1110D2009, TH1110DH1003, TH2110DH1002, TH2210DH1000, and TH4110D1007.
This replacement unit matches key operational requirements for single-stage setups. It handles 1 Heat/1 Cool stages and is listed for heat pump use. It features push button controls, auto changeover, fan control, and a horizontal mount profile.
- Stages: 1 Heat/1 Cool
- Use: Heat Pump
- Programming: 5-1-1 Day
- Power: Battery
- Mount: Horizontal
- Controls: Push Button
- Frequency: 60 Hz
- Temperature range: 32°F to 120°F
- Humidity range: 5 to 90% RH, non-condensing
- Color: White
Matching your system
Before swapping your thermostat, make sure your system setup matches the specifications of the replacement unit. Verify whether your system is gas, electric, or a heat pump.
Check how many heating and cooling stages your equipment has. This replacement handles 1 Heat and 1 Cool stage. Also verify whether your current setup relies on battery power or uses a common wire from the equipment.
Installation tips
Before you pull the old thermostat off the wall, take a clear photo of the wiring. Note which colored wire attaches to each letter terminal. Labeling them saves time and prevents wiring mistakes.
Shut off power at the breaker or furnace switch first. Move each wire one at a time to the matching terminal on the new subbase. Once the wires are secure, snap the new thermostat onto the horizontal wall plate and restore power.
How to confirm it fits
- Check the part number on your old unit to confirm it reads TH4110U2005 or an equivalent cross reference.
- Verify your equipment uses 1 Heat/1 Cool stages.
- Confirm your system application matches heat pump use.
- Make sure you want 5-1-1 Day programming with push button controls.
- Check that your wall location accommodates a horizontal mount.
Questions
Does the TH2110U4004 replace part number TH4110U2005?
Yes, the Honeywell Home TH2110U4004 lists TH4110U2005 in its replacement numbers.
What power source does this replacement thermostat use?
The TH2110U4004 uses battery power.
Can this thermostat control a heat pump?
Yes, this unit is listed for heat pump use with 1 Heat/1 Cool stages.
What schedule options does this thermostat provide?
It features 5-1-1 Day programming, letting you set schedules for weekdays, Saturday, and Sunday.
Related guides
Brand names and part numbers are used only to show fit. HVAC Fitter is not affiliated with, authorized by, or endorsed by any equipment maker. If you are not sure a repair is safe for you, call a licensed HVAC technician.