Engineering Causes, Compliance Risks & Winter Maintenance Strategy

Cold temperatures affect the viscosity of hydraulic fluids, the response of brake torque, the efficiency of lubrication, and the calibration of sensors. If the outside temperature goes below the permitted operating temperature (generally below 5°C for most systems), the safety of lifts could be significantly compromised.

Winter readiness is a necessity for facility managers, consultants, and building engineers in terms of compliance and operations.

Operating Temperature Standards & Compliance Requirements

Elevator systems are designed to operate in a given set of weather conditions.

According to: 

• ASME A17.1 / CSA B44 Safety Code for Elevators 
• EN 81 (European Standard for Lift Safety)

Machine rooms, control cabinets, and drive systems must all perform within a certain temperature range to make sure that brakes work properly, motors work properly, and safety relays respond quickly.

Most manufacturers say:

• The temperature in the machine room should be between 10°C and 40°C.
• The best temperature range for hydraulic oil is 20°C to 35°C.

Not keeping these conditions could lead to:

• Less torque when braking
• Higher amperage drain from the motor
• Parts that wear out too soon
• Not following the code during the inspection

Engineering Mechanisms Behind Cold Weather Impact

1. Hydraulic Oil Viscosity & Pump Load

Cold weather makes hydraulic lifts very dangerous.

When the temperature goes down:

• The viscosity of oil goes up.
• The flow rate goes down.
• The pump pressure makes up for it.
• The motor’s amperage goes up

This means:

• Car acceleration is slower
• Late levelling of the floor
• Using more energy
• Higher chance of the pump being too hot

Hydraulic systems are the most susceptible to changes in temperature since they rely on fluids to work. You can read more about the different types of lifts 

When it’s really cold, oil heaters or tank warming systems are needed to keep the viscosity levels safe.

2. Traction Elevator Brake & Drive Response

Traction systems depend on:

• Brakes that use electricity
• Ropes made of steel
• Balance of the counterweight
• Variable frequency drives (VVVF)

Cold weather can affect:

• Time it takes for the brake coil to respond
• How thick the lubrication film is on ropes
• Efficiency of sheave traction
• Tolerance for metal contraction

Our guide to elevator traction machines  goes into more detail about how these systems work. If the brake torque reaction is delayed because of the heat, the accuracy of the stop may be affected, which increases the danger of accidents.

3. Door System Contraction & Sensor Drift

The most typical winter complaint is that doors don’t work right.

Some things that induce engineering are:

• Aluminium track shrinkage
• Higher coefficient of friction
• Condensation of moisture inside door operators
• Misalignment of the infrared sensor

Newer systems now have cutting-edge Safety Innovations for Elevator Components. to make it less likely that things will get in the way and to make detection more reliable.

The largest risk of exposure to winter weather is for lobby installations on the outside.

Hydraulic vs Traction Elevators in Cold Climate

Factor	Hydraulic Elevator	Traction Elevator
Cold Sensitivity	High	Moderate
Oil Viscosity Impact	Severe	None
Brake Performance Risk	Moderate	Moderate
Lubrication Issues	Moderate	Moderate
Energy Impact	Increased motor load	Slight efficiency drop
Recommended Mitigation	Oil heaters, insulated machine room	Lubrication inspection, brake testing

 

In places where it gets cold, modernisation can be necessary. Elevator modernisation solutions can greatly lower the number of failures caused by temperature changes.

2026 Engineering-Grade Winter Maintenance Protocol

For engineers and contractors who work on facilities:

Machine Room Environmental Control

Keep it at least 10°C

Put in thermostatic oil warmers for hydraulic systems.

Make sure that ventilation systems don’t let in chilly air drafts.

Hydraulic System Inspection

• Check that the oil grade is right for the weather
• Check the pump’s amperage while it’s working
• Check the integrity of the cylinder seal

Traction System Inspection

• Check how the brake torque responds
• Put winter-grade lubricant back on the ropes.
• Check the calibration of the VVVF drive

Door System Testing

• Find out how much force it takes to close the door.
• Check the tolerance for track alignment
• Recalibrate the sensors that detect obstructions

Predictive Monitoring

Now, systems with IoT can keep track of:

• Change in temperature
• Stress on the brake cycle
• Changes in motor current

These solutions can lower the number of failures in modernised systems by as much as 40% in the winter. Insulated shaft designs and optimised Elevator Cabin Designs also help keep performance stable.

Real-World Scenario Example

In commercial buildings in very cold areas, hydraulic oil temperature has been found to drop below the ideal viscosity levels during nighttime shutdowns. This makes the start-up reaction slower during the morning rush hour, which means that service will be temporarily stopped until the oil temperature stabilises.

Preventive heating systems get rid of this problem completely.

Frequently Asked Technical Questions

At what temperature do elevators begin to malfunction?

If machine rooms aren’t temperature-controlled, most hydraulic systems start to work less well when the temperature drops below 5°C.

Are traction elevators safer in cold climates?

Usually more stable than hydraulic systems, but you still need to keep an eye on the brakes and maintenance.

Is winter maintenance legally required?

Even if the rule doesn’t say it has to be seasonal, ASME and EN standards say that environmental conditions must be kept at the levels set by the manufacturer.

Can modernization reduce cold weather failure?

Yes. New drives, clever sensors, and insulated installations make it much less likely that things will break down during the winter.

Final Engineering Conclusion

Cold weather doesn’t stop lifts on its own; bad environmental control does.

The main things that put you at risk are:

• Higher viscosity of hydraulic oil
• Delay in brake torque response
• Contraction of the door track
• Sensor drift caused by condensation

 

Elevators can work dependably even in very cold weather if they are properly maintained, updated, and followed the rules.

Winter readiness is not simply basic maintenance for building owners and facilities engineers; it is also a measurable way to manage risk.