Too dumb to fail.

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White-Rodgers 1F56N-444
D4 · Level 1 · Electric, no logic An electric rock

White-Rodgers 1F56N-444

White-Rodgers 1F56N-444 mercury-free mechanical thermostat.

$40Buy on Amazon
Amazon US, October 2026. Prices change.

A bimetal coil and a lever. Set the temperature with a slider and it switches the heating on and off for the next forty years.

Repairable
Opens with common tools, spare parts are available, and replacement parts work without the maker unlocking them.

Where to buy

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Survival checklist

What it survives, next to the smart one it replaces.
1
=SURVIVES(threat)Survives…
ThisWhite-Rodgers 1F56N-444
What it replacesSmart oneGoogle Nest Learning Thermostat (4th gen)
2
Power cut
FALSE
FALSE
3
Wi-Fi goes down
TRUE
#DEPENDS
4
The company switches off its servers
TRUE
#DEPENDS
5
Someone tries to hack it
TRUE
FALSE
6
A firmware update goes wrong
TRUE
FALSE
7
Twenty years from now
TRUE
#DEPENDS
8
=COUNTIF(TRUE)Total
5 of 65/6
0 of 60/6and three maybes

The smart one is the Google Nest Learning Thermostat (4th gen).

Row 4

See it in the sheetIn the sheet
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Turn the dial. A strip of metal does the rest.

White-Rodgers 1F56N-444

$40
Repairable
White-Rodgers 1F56N-444$40
Buy on Amazon