How Do I Set Up My Nest Thermostat for a Heat Pump?
- Heat Pump Balance set to Max Comfort, over-using AUX
- Heat Pump Balance set to Max Savings for a cold climate
- AUX lockout temperature set too high or too low
Problem Description
You want to set up your Nest thermostat correctly for a heat pump — configuring Heat Pump Balance, auxiliary (backup) heat, emergency heat, and the AUX lockout temperature so the system stays comfortable without over-using the expensive backup strips. Getting these settings right is what keeps a heat pump efficient in mild weather and warm during cold snaps.
Why This Happens in Real Homes
Setting up a heat pump on the Nest comes down to one balance: using the efficient heat pump as much as possible while letting the expensive backup strips help only when it's genuinely cold. That's what Heat Pump Balance controls — Max Savings holds AUX back, Max Comfort uses it freely, Balanced sits between.
Start by matching Heat Pump Balance to your climate and setting a reasonable AUX lockout (35-40°F suits many homes), then use Energy History to see whether AUX is running in mild weather — a sign to dial it back. Keep Emergency Heat off unless the heat pump itself has failed; it runs backup strips only and costs far more.
Symptoms
- Unsure how to configure a heat pump on the Nest
- AUX/backup heat runs too often or not enough
- High bills from excessive auxiliary heat
- Not sure of AUX versus Emergency heat
- House slow to warm on cold mornings
- Emergency Heat left on by mistake
- AUX lockout temperature unclear
- Heat Pump Balance setting confusing
Recognize these? Here's what usually causes it.
Common Causes
- Heat Pump Balance set to Max Comfort, over-using AUX
- Heat Pump Balance set to Max Savings for a cold climate
- AUX lockout temperature set too high or too low
- Emergency Heat mode left engaged
- O/B reversing-valve wire set wrong
- Backup heat wired but not configured
- Climate not matched to the balance setting
- Confusion between AUX and Emergency heat
Most fixes happen in the first 3 steps.
Always turn off your HVAC system at the breaker before removing the thermostat or touching wires. Incorrect wiring can damage both the thermostat and your HVAC equipment resulting in expensive repairs. If unsure about wiring consult an HVAC technician.
Tools & Requirements
These tools will help you complete this fix.
As an Amazon Associate we earn from qualifying purchases.
Step-by-Step Solution
Configure Heat Pump Balance
If you have a heat pump with auxiliary (backup) heating strips, the Nest Heat Pump Balance setting controls how aggressively the system uses the expensive AUX heat. In the Google Home app, go to thermostat settings, then Heat Pump Balance. Options: Max Savings (minimizes AUX use, best for mild climates), Balanced (moderate AUX use, works for most homes), and Max Comfort (uses AUX freely to reach target temperature fast).
Understand AUX versus emergency heat
AUX heat supplements the heat pump when outdoor temperatures are too low for efficient heat pump operation. The Nest activates AUX automatically when needed. Emergency Heat bypasses the heat pump entirely and runs only the backup heating strips — use this only if the heat pump fails (outdoor unit damage, refrigerant leak). Running Emergency Heat continuously costs 2-5 times more than heat pump operation.
Set the AUX lockout temperature
The AUX lockout temperature is the outdoor temperature below which AUX heat is allowed to activate. In Max Savings mode, the lockout is set very low so AUX rarely runs. In Max Comfort, there is no effective lockout. If you set Heat Pump Balance to Off, you can manually specify the exact lockout temperature. For most climates, 35-40°F is a reasonable balance — the heat pump handles temperatures above this efficiently.
Monitor energy usage patterns
Check the Nest Energy History in the Google Home app. It shows when AUX heat ran and how much energy it used. If AUX heat is running daily in moderate weather (above 40°F), your Heat Pump Balance may be set to Max Comfort unnecessarily. Switch to Balanced to reduce AUX usage. If you see Emergency Heat running, something is wrong with the heat pump system — do not leave it in Emergency Heat mode.
Optimize for your specific climate
In mild climates (Southeast US, Pacific Coast), Max Savings works well because the heat pump handles most conditions. In cold climates (Northeast, Midwest), Balanced is better because the heat pump needs AUX help on cold mornings. In very cold climates (upper Midwest, mountain regions), Max Comfort may be necessary to maintain comfort during extreme cold snaps. Adjust seasonally if needed.
Quick Solutions
Still having issues? This is usually the deeper cause below.
Schedules that skip randomly are usually a daylight-saving holdover — delete and recreate the schedule to clear the corrupted entry.
Use the thermostat energy reports to find patterns in your heating and cooling usage. Setting back the temperature just 3 degrees when you leave for work can save 5 to 10 percent on your annual energy bill without any comfort sacrifice. **Product Intelligence:** - C-wire required for most models - 2.4GHz WiFi only - Nest Aware subscription for history
Thermostat issues that keep returning are often caused by stale backup-battery memory holding old settings across power cycles without the user realising.
- Heat Pump Balance set to Max Comfort, over-using AUX
- Heat Pump Balance set to Max Savings for a
- AUX lockout temperature set too high or too low
- Emergency Heat mode left engaged
- O/B reversing-valve wire set wrong
Before you go — try one of these (they fix most cases).
Most popular upgrades chosen by Nest Thermostat owners.
Google Nest Thermostat Trim Kit - Made for the Nest Therm...
Google Nest Thermostat Trim Kit - Made for the Nest Therm...
Google Nest Thermostat - Smart Thermostat for Home - Prog...
As an Amazon Associate we earn from qualifying purchases.
Official Manufacturer Manual
Google Nest provides official product documentation through their online manual rather than downloadable PDF. Access setup guides, troubleshooting steps, and product specifications for your Nest Thermostat.
Source: google.com
Need More Help? Google Nest Support
Note: The contact information below connects you directly to Google Nest's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.
How Does Google Nest Compare?
Before replacing your Google Nest device, see how it stacks up against alternatives in our full comparison guides.
Accessories owners commonly pair with Nest Thermostat.
Ring Rechargeable Quick Release Battery Pack
Ring Chime Pro
SwitchBot Hub Mini Smart Remote - IR Universal Remote, Wi...
As an Amazon Associate we earn from qualifying purchases.
