Honeywell Home CT87N1001 The Round Thermostat

The verdict

The Round is a mechanical thermostat: turn the dial to the temperature you want — labeled 50, 60, 70, and 80 with tic marks every 2 degrees — and a small Heat/Off/Cool switch and fan switch beside it choose the mode. It holds temperature within plus-or-minus 1 degree, needs no C-wire and no batteries, is mercury-free, and works with single-stage 24V heating and cooling systems.

Honeywell Home CT87N1001 The Round Thermostat — about $42 at Amazon · 4.4★ · Blind pick (no sight needed) — the classic round dial thermostat that has run American heating since 1953, with no screen, no app, no batteries, and no programming to fight.

The box even includes a Braille card and large-print subbase labels, a rare sight in a thermostat box. It is 3.25 inches across and carries a 1-year limited warranty.

Specs

  • Mechanical round dial thermostat; heat and cool
  • Dial labeled 50, 60, 70, 80 with tic marks every 2 degrees
  • Heat/Off/Cool system switch and fan switch
  • Temperature accuracy within plus-or-minus 1°F
  • No C-wire, no batteries, no programming, no app
  • Mercury-free; includes Braille card and large-print subbase labels
  • 3.25 inches diameter; 1-year limited warranty
  • Not compatible with heat pumps with auxiliary heat, multistage systems, or electric baseboard heat

Blind details

For a blind user, this is the thermostat the talking VIP 3000 sits beside, not behind: where the VIP talks, the Round is pure touch — the dial's detents and tic marks are countable by finger, and one bump dot at 70°F marks the everyday setting. The Heat/Off/Cool switch gets a dot at Heat. What we checked is the control mechanism in the maker's own owner's manual — the dial, the switches, the Braille card in the box — not a blind hands-on test, so count the tic marks from 70 on your own unit before relying on the dot. Note the limits: it does not work with heat pumps with auxiliary heat, multistage systems, or 120/240V electric baseboard heat, so check your system type first.

Support: Reachable by phone — Resideo (Honeywell Home) Customer Care at 1-800-468-1502 (published in the CT87N owner's manual).

Honest caveats: This thermostat tells you nothing back — there is no voice, no beep, and no display, so the room temperature is judged by feel and by a separate talking thermometer if you want a number spoken. The price has drifted over time — about $42 at Amazon against a $42.99 list, with sale prices near $34 seen — so the figure above is a November 2026 snapshot, not a quote. Installation needs a small flat screwdriver in a tight base-plate opening, which is fiddly by touch; have the installer set the dial dot and the Heat switch before they leave.

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Last reviewed: October 2026.