---
title: "Checking Your Refrigerator Temperature Properly"
description: "The display shows what you asked for, not what the cabinet is doing. How to measure a built-in refrigerator or freezer column with a thermometer, the targets to expect, and"
url: "https://thermadormiami.support/blog/checking-your-refrigerator-temperature/"
date_modified: "2026-08-18"
Category: "Troubleshooting"
---


# Checking Your Refrigerator Temperature Properly

## Why this is worth doing carefully on this brand

Most makes give you an error code when refrigeration drifts. This one does not — Thermador publishes no refrigeration error codes at all, and the pages where they would live simply do not exist. What a Freedom column offers instead is an alarm, a symbol, and a self-test.

That puts more weight on measurement than it would carry on another make. Two numbers taken overnight are the most useful thing you can hand a technician before anybody opens a panel, and they are also what tells you whether there is anything to hand over at all.

## The method

**Refrigerator.** Fill a glass with water, stand it on the middle shelf toward the front, and leave it overnight with the door closed. Read it first thing, before the door has been opened.

**Freezer.** Slide the thermometer between two frozen packages rather than leaving it in the air. Same overnight wait, same rule about not opening the door.

**Read both in the morning.** The refrigerator should be between 37 and 40°F. The freezer should be 0°F or below.

**Measure water, not air.** Air inside a cabinet swings by several degrees every time the compressor starts and stops, so an air reading tells you where in that cycle you happened to look. Water averages it out — which is precisely why food-safety guidance is written around it.

## What the numbers mean

- **Both on target.** The cooling system is doing its job. If something still feels wrong, the question is airflow or the door rather than the compressor.- **Refrigerator warm, freezer fine.** On separate columns those are two appliances and it tells you little. Inside one cabinet it points at airflow or a damper — the cheaper end.- **Both warm, and the compressor is running constantly.** Now the list is the door seal, the condenser, and then the sealed system, [checked in that order and for good reason](/services/refrigerator-sealed-system-repair/).- **Colder than the target.** A cabinet that freezes lettuce is a different diagnosis from a warm one, and it has its own answer — [here](/blog/refrigerator-freezing-food/).

## Check the thermometer itself, once

Fill a glass with crushed ice, top it with water, stir, and give it three minutes. It should read 32°F. If it does not, you now know the offset and can subtract it — which is better than arguing with a technician about whose instrument is wrong.

## The column's own diagnostics

Two things a Freedom column will tell you that a thermometer cannot:

**The highest temperature it reached.** Press the ALARM button on a cabinet that has alarmed. The signal stops and the peak temperature shows for a few seconds — once. Read it before you clear anything; it is the only measurement the appliance offers about what happened while you were out.

**Its self-test.** Switch the column off, wait five minutes, switch it on with the door closed, then hold SETUP and ALARM OFF together for five seconds. It works through its diagnostics and finishes either by showing the set temperature — nothing found — or with the alarm symbol and a message. It is documented, it is yours to run, and either outcome is worth having before a visit.

## What to write down before you call

- Both numbers, and when you took them- Whether the compressor sounds like it ever stops- The highest temperature from the alarm, if there was one- Whether the door seal grips a sheet of paper all the way round- How long it has been happening

Those five lines shorten a diagnostic visit and occasionally end it on the phone. Either way you have paid for nothing to find out.

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