🌡️Thermostat

E01

Nest · Nest Learning Thermostat (4th Gen)

Nest Nest Learning Thermostat (4th Gen) E01 Error Fix: Auto-Schedule Not Learning Correctly

The Nest learning algorithm is not adapting to the user's routine or is setting temperatures at inconvenient times. Learning requires 1-2 weeks of consistent user behavior data. Multiple users adjusting the thermostat creates conflicting signals. Manual schedule changes override learning. Manually delete unwanted schedule entries in Settings > Schedule. Reset the schedule entirely via Settings > Reset > Schedule > Reset. Ensure Home/Away Assist is enabled with phone locations for all household members. Note: The Nest Thermostat (2020) does NOT have Auto-Schedule — it uses Savings Finder suggestions instead.

Low severity2 fixes available✨ Free fix available

Quick Answer

Error E01 on the Nest Nest Learning Thermostat (4th Gen) means: Auto-Schedule Not Learning Correctly. The top-ranked community fix is “Factory Reset and Firmware Update to Restore Auto-Schedule Function” (medium difficulty, ~30 min, DIY cost: $0). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · thermostat

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many thermostat repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $100-$180.

Other Nest Models with Error E01

Nest Learning Thermostat (3rd Gen)

thermostat · 2 fixes

Nest Thermostat E

thermostat · 2 fixes

Other Nest Nest Learning Thermostat (4th Gen) Error Codes

A01

No Power / Low Battery

2 fixes

A02

'Delayed' Message on Display

2 fixes

A03

No Power to Rh/Rc Wire

2 fixes

A04

W1/W2 Heating Wire Not Detected

2 fixes

A05

Y1/Y2 Cooling Wire Not Detected

2 fixes

A06

G (Fan) Wire Not Detected

2 fixes

A07

O/B (Heat Pump Reversing Valve) Wire Not Detected

2 fixes

A08

Wiring Error / Incompatible Wiring

2 fixes

People Also Ask About Nest Nest Learning Thermostat (4th Gen) Error E01

What does error code E01 mean on a Nest Nest Learning Thermostat (4th Gen)?

Error code E01 on the Nest Nest Learning Thermostat (4th Gen) means: Auto-Schedule Not Learning Correctly. The Nest learning algorithm is not adapting to the user's routine or is setting temperatures at inconvenient times. Learning requires 1-2 weeks of consistent user behavior data. Multiple users adjusting the thermostat creates conflicting signals. Manual schedule changes override learning. Manually delete unwanted schedule entries in Settings > Schedule. Reset the schedule entirely via Settings > Reset > Schedule > Reset. Ensure Home/Away Assist is enabled with phone locations for all household members. Note: The Nest Thermostat (2020) does NOT have Auto-Schedule — it uses Savings Finder suggestions instead.

How do I fix error code E01 on my Nest Nest Learning Thermostat (4th Gen)?

The most successful fix is "Factory Reset and Firmware Update to Restore Auto-Schedule Function" (medium difficulty, ~30 minutes). This fix costs nothing. HomeMD has 2 community-ranked fixes for this error.

Is error code E01 on a Nest Nest Learning Thermostat (4th Gen) serious?

This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Can I fix Nest Nest Learning Thermostat (4th Gen) error E01 myself?

Yes — the top-ranked community fix ("Factory Reset and Firmware Update to Restore Auto-Schedule Function") is rated medium difficulty and takes about 30 minutes. Tools needed: Smartphone with Nest app installed.

How much does it cost to repair Nest Nest Learning Thermostat (4th Gen) error E01?

DIY cost: $0. Professional repair typically costs $100-$180. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Nest Nest Learning Thermostat (4th Gen) have?

The Nest Nest Learning Thermostat (4th Gen) has 8 other known error codes, including: A01 (No Power / Low Battery), A02 ('Delayed' Message on Display), A03 (No Power to Rh/Rc Wire), A04 (W1/W2 Heating Wire Not Detected), A05 (Y1/Y2 Cooling Wire Not Detected), and 3 more.

Which other Nest models have the E01 error?

Error code E01 also appears on 2 other Nest models: Nest Learning Thermostat (3rd Gen), Nest Thermostat E. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Nest Nest Learning Thermostat (4th Gen) have?

The Nest Nest Learning Thermostat (4th Gen) has 8 other known error codes:

A01 — No Power / Low Battery (2 fixes)
A02 — 'Delayed' Message on Display (2 fixes)
A03 — No Power to Rh/Rc Wire (2 fixes)
A04 — W1/W2 Heating Wire Not Detected (2 fixes)
A05 — Y1/Y2 Cooling Wire Not Detected (2 fixes)
A06 — G (Fan) Wire Not Detected (2 fixes)
A07 — O/B (Heat Pump Reversing Valve) Wire Not Detected (2 fixes)
A08 — Wiring Error / Incompatible Wiring (2 fixes)

Which other Nest models have the E01 error?

Error code E01 also appears on 2 other Nest models:

Nest Learning Thermostat (3rd Gen) (thermostat) · 2 fixes
Nest Thermostat E (thermostat) · 2 fixes

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