How to Protect Your Heat Pump During the Snow & Winter Weather
Snow mixed with some cold temperatures and potentially some ice can be tough on your heat pump—but with a little preparation and awareness, homeowners in Gaithersburg and surrounding areas of Maryland can keep their system running safely and efficiently all winter long.
Here’s what Mallick Mechanical Services recommends you to:
Keep the Outdoor Unit Clear
Your heat pump’s outdoor unit needs airflow to operate properly – especially in the cold weather and snow.
What We Recommend:
- Gently clear snow from around the unit (sides and top)
- Maintain at least 18–24 inches of clearance
- Avoid piling shoveled snow near the unit
One important note: Try not to chip away at any ice with sharp tools as this could damage the unit or the coils.
| What To Do | Why It Matters |
| Clear Snow from the Top of the Unit | Prevents Snow from Blocking Airflow & Interfering with System Operation |
| Clear Snow from All Side | Heat Pumps need Open Airflow to Pull Heat from the Outdoor Air (Even in the Winter) |
| Maintain 18-24″ of Clearance | Ensures Proper Airflow and Helps the System Run Efficiently |
| Use a Broom or Gloved Hands | Protects Delicate Coils from Damage |
| Avoid Sharp Tools or Chipping Ice | Prevents Costly Damage to Coils, the Unit and Internal Components |
Contact Us at 301-840-5860 for more assistance with your heat pump!
Avoid Covering the Unit
A common misconception is that heat pumps should be wrapped or covered during the snowstorms.
Why not?
- Heat pumps are designed for winter operation
- Full covers trap moisture and can cause icing or corrosion
If you must, please use a top-only cover designed specifically for heat pumps to block falling snow. Mallick Mechanical Services does not recommend using a tarp or plastic wrap.
Understand Defrost Mode (It’s Normal!)
If you see steam rising from your outdoor unit or hear it change sounds, don’t panic.
This likely means:
- Your system has entered defrost mode
- Ice is being melted off the outdoor coil
This is a normal and necessary function during freezing temperatures. Make sure to continue to let the unit run. By shutting it off, you can worsen ice build up.
Keep Vents and Filters Clean Indoors
Snowy weather often means your system runs longer—dirty filters make it work harder than it should.
Homeowner checklist:
- Replace or clean filters regularly
- Ensure supply and return vents are not blocked
- Keep furniture and rugs away from airflow paths
It’s simple: Better airflow = better comfort and efficiency, which is extremely important in the winter.
Know When to Call a Professional
If your heat pump isn’t keeping up, runs constantly, or shuts off during cold weather, it may be time for a professional evaluation.
Call for service if you notice:
- Ice buildup that doesn’t clear
- Reduced heating performance
- Unusual noises
- Rising energy bills
A proactive check can prevent mid-winter breakdowns and costly emergency repairs.
Stay Warm—Without Worry
Heat pumps are built to handle winter conditions, but a little homeowner awareness goes a long way. Keeping your system clear, clean, and properly maintained helps ensure consistent comfort—even during Maryland’s snowiest days.
Heat pump making strange noises? Contact us at 301-840-5860 for any questions and assistance.
