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Lo

Haier Lo on a tumble dryer: room temperature is too low

Verified with sources2 sourcesReviewed Oct 4, 2026
Technician coming? See the 2 steps they must show you
Front-loading tumble dryer
Sweetie candykimCC0Image source

Risk level

Low

Usually safe to check without specialist tools.

Urgency

Low

Quick answer

On Haier heat pump dryers, Lo warns that the room is too cold. Haier says to use the dryer only above 5 °C: check the room temperature, warm the room or move the dryer to a dry, mild place, then start the programme again.

Safety first

Stop and check this first

  • Haier warns against installing the dryer outdoors, in damp places or where it is exposed to frost; after a water leak, cut the power and let it dry naturally.

Safe checks you can perform

  • Measure the room temperature next to the dryer
  • Warm the room or move the dryer
  • Check where the dryer is installed

Leave these tasks to a qualified professional

  • Do not attempt this professional task: Diagnosis if Lo shows in a warm room
  • Do not attempt this professional task: Test cycle in normal conditions

What a technician must be able to justify

Technician visit

These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.

These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.

  1. Diagnosis if Lo shows in a warm room

    What they doIf Lo appears while the room is clearly above 5 °C, the Haier technician compares the real room temperature with what the dryer reads and checks what measures that temperature.

    They must show youthe room temperature on their thermometer and the value the dryer is reading.

    In writingthe code read, the measured temperatures, any part replaced and the test carried out.

  2. Test cycle in normal conditions

    What they doAfter the check, the technician runs a programme with the room inside the 5 to 35 °C range and confirms it finishes without showing Lo.

    They must show youthe complete programme with no Lo on the display.

    In writingthe room temperature during the test and the outcome of the cycle.

Before accepting a part or repair

Nothing has been shown yet. Do not accept a part swap based on the code alone.

Follow these steps

Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.

  1. Measure the room temperature next to the dryer

    No special tools

    Who:
    you, with a room thermometer.
    How:
    leave a thermometer beside the dryer, at the height of the appliance, for a few minutes and note the reading. Haier requires an ambient temperature between 5 and 35 °C. Do this at the time you usually run the dryer, since nights and early mornings can be much colder.
    Result that matters:
    you know whether the room is above or below 5 °C when you use the dryer.
    If it reads below 5 °C:
    the cold explains Lo, so move on to the next step.
    If it reads well above 5 °C and Lo stays:
    note the reading for customer service.
    Evidence to keep:
    photo of the thermometer beside the dryer with the time.

    Evidence: User manual Heat-Pump-Dryer HD90-A636 (GB V07 082016)

  2. Warm the room or move the dryer

    No special tools

    Who:
    you.
    How:
    raise the room temperature above 5 °C or move the dryer to a dry, well ventilated place that stays above that figure. Do not put it next to stoves or heaters or in direct sunlight, which Haier also forbids. Then select and start the programme again.
    Result that matters:
    the dryer in a mild place and the programme running without Lo.
    If it runs normally once the room is warmer:
    keep those conditions through the winter.
    If Lo returns in a warm room:
    switch off, unplug and call Haier customer service.
    Evidence to keep:
    a note of the room temperature when you tried again.

    Evidence: User manual Heat-Pump-Dryer HD90-A636 (GB V07 082016)

  3. Check where the dryer is installed

    No special tools

    Who:
    you.
    How:
    make sure the dryer is not outdoors, in a damp place or next to a sink where leaks are likely, and that it is not exposed to frost. Haier wants a dry, well ventilated spot above 5 °C, with no carpet covering the ventilation openings in the base.
    Result that matters:
    a location that meets the manual's conditions.
    If it is somewhere not allowed:
    move it before using it again.
    If the location is correct:
    the warning depends only on the temperature at the time.
    Evidence to keep:
    photo of where the dryer is installed.

    Evidence: User manual Heat-Pump-Dryer HD90-A636 (GB V07 082016)

Still not solved

If the error persists, stop here. See what the technician must do and show you.

Where this code applies

A code is meaningful only inside the right product and version context.

Primary scope

System
Appliances
Brand
Haier
Product type
Dryers

Known code variants

  • error Lo secadora Haier
  • Haier dryer in garage Lo
  • Haier dryer Lo
  • Haier dryer Lo cold room
  • Haier dryer room too cold
  • Haier HD90-A636 Lo
  • Haier secadora Lo
  • Haier tumble dryer error Lo
  • L o
  • LO
  • secadora Haier en garaje Lo
  • secadora Haier Lo frío
  • secadora Haier temperatura ambiente baja

What it means

The user manual for the Haier HD90-A636 heat pump dryer (GB edition V07, 2016) shows Lo when the ambient temperature is too low and says to use the dryer only at ambient temperatures above 5 °C. Its technical data allow 5 to 35 °C, and it forbids installing the dryer outdoors or where it is exposed to frost. It is a usage condition warning, common in unheated garages and outbuildings in winter. Other Haier dryers may behave differently. Lo alone does not show that any component is broken.

Warnings and stop conditions

  • Lowsource verified

    Haier warns against installing the dryer outdoors, in damp places or where it is exposed to frost; after a water leak, cut the power and let it dry naturally.

    Evidence: User manual Heat-Pump-Dryer HD90-A636 (GB V07 082016)

Symptoms and causes

Probable causes · in order

  • Room below 5 °CCommon

    The dryer stands in a room, garage or store that drops below the 5 °C minimum Haier requires for use during winter.

    Evidence: User manual Heat-Pump-Dryer HD90-A636 (GB V07 082016)

  • Installed outdoors or exposed to frostPossible

    The manual forbids installing the dryer outdoors or where it is exposed to frost; there the appliance cools below its permitted range.

    Evidence: User manual Heat-Pump-Dryer HD90-A636 (GB V07 082016)

Virtual technician

Does Lo still appear after these checks?

Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.

Sources and technical references

Sources: User manual Heat-Pump-Dryer HD90-A636 (GB V07 082016) · Manual del usuario secadora con bomba de calor Haier HD90-A636-E (ES V01 150719)reviewed 2026-10-04 · verified

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