Web Analytics Made Easy - Statcounter
Skip to main content
Date
February 06, 2025

Common Heat Pump HVAC Issues: What Homeowners Need to Know & When to Call Denommee

🌡️ Heat Pump Not Working Right? You’re Not Alone

Heat pumps are incredibly efficient systems that provide both heating and cooling, but like any mechanical system, they can run into trouble—especially during seasonal extremes in New England.

If your heat pump isn’t heating or cooling properly, it’s important to understand what might be going wrong, what steps you can take as a homeowner, and when to call in the pros.

At Denommee Plumbing, HVAC & Electric, we specialize in high-efficiency ducted and ductless heat pump systems across Massachusetts and Southern New Hampshire. We’re here to help you stay comfortable—and informed.

🔧 Common Heat Pump HVAC Problems (and What Causes Them)

1. Heat Pump Isn’t Turning On

If your system isn’t starting at all, the issue could be as simple as a tripped breaker or as complex as a failed compressor.

Possible Causes:

  • Tripped circuit breaker or blown fuse

  • Thermostat not communicating

  • Reversing valve failure

  • Contactor or capacitor malfunction

Homeowner Tips:

  • Check the thermostat settings and battery

  • Verify that the circuit breaker is on

  • Ensure outdoor unit isn’t iced over or obstructed

Call Denommee if: You’ve checked the basics and the system still won’t start.

2. Heat Pump Blowing Cold Air in Heat Mode (or Vice Versa)

If you’re getting the opposite of what you expect, your reversing valve, which controls the flow direction of refrigerant, may be stuck or malfunctioning.

Possible Causes:

  • Reversing valve failure

  • Thermostat misconfiguration

  • Low refrigerant levels

  • Faulty defrost cycle

Homeowner Tips:

  • Try resetting the thermostat

  • Monitor outdoor unit for icing

Call Denommee if: It continues after a reset, or airflow doesn’t match your settings.

3. Weak or No Airflow

If your heat pump is running but barely pushing air, you may have a clogged filter or a blower motor issue.

Possible Causes:

  • Dirty air filter or indoor coil

  • Blocked or leaky ductwork

  • Blower motor failure

  • Damper issues in ducted systems

Homeowner Tips:

  • Replace or clean the air filter

  • Make sure vents are open and unobstructed

Call Denommee if: Airflow issues persist even after replacing the filter.

4. System Short-Cycling (Turning On and Off Frequently)

Short-cycling wastes energy and stresses your system.

Possible Causes:

  • Thermostat located near heat source

  • Low refrigerant or refrigerant leak

  • Oversized system

  • Dirty condenser coils

Homeowner Tips:

  • Check for airflow blockages

  • Monitor how long the system runs before cycling off

Call Denommee if: The unit runs only for a few minutes at a time consistently.

5. Outdoor Unit Freezing Over

While it’s normal for some frost to accumulate in winter, excessive ice can damage components.

Possible Causes:

  • Failed defrost cycle

  • Low refrigerant

  • Dirty coils or blocked airflow

  • Outdoor fan failure

Homeowner Tips:

  • Remove debris or leaves from around the unit

  • Monitor after clearing snow or ice

Call Denommee if: Ice buildup persists or grows thicker over time.

6. High Electric Bills with Poor Performance

If your heat pump is using more energy than usual, something’s not working as it should.

Possible Causes:

  • Dirty filters or coils reducing efficiency

  • Refrigerant issues

  • Faulty sensors or thermostats

  • Aging or poorly installed system

Homeowner Tips:

  • Schedule regular maintenance

  • Track your energy usage month to month

Call Denommee if: Your bills spike without a change in usage habits.

🛠️ Preventative Maintenance: The Key to a Healthy Heat Pump

The best way to avoid heat pump breakdowns? Annual or semi-annual maintenance. Denommee offers seasonal tune-ups that include:

  • Coil cleaning

  • Electrical component testing

  • Refrigerant checks

  • Defrost cycle diagnostics

  • System performance optimization

Preventative care helps extend system life, reduce repair costs, and boost efficiency—especially for cold climate heat pumps designed to run through tough New England winters.

🌎 We Service Ducted and Ductless Heat Pump Systems

Whether your home uses a fully ducted central system or a ductless mini-split, Denommee has the expertise to diagnose and repair it fast.

We work with all major brands including:

  • Mitsubishi Electric

  • Fujitsu

  • LG

  • GE Hair

  • Daikin

  • Carrier/Bryant

If your heat pump was installed through Mass Save or a municipal rebate program like Abode, chances are we’ve worked with that system—and we’re often the contractors who installed them in the first place.

🏠 Local Heat Pump Repair You Can Trust

Why choose Denommee Plumbing, HVAC & Electric?

✅ Over 25 years of HVAC service
✅ Fully licensed & insured in MA and NH
✅ Trusted Mass Save and Abode participating contractor
✅ Deep experience with cold climate heat pumps
✅ Fast, respectful, and professional service

From Tewksbury, Acton, Billerica, Concord, Groton, Burlington to Nashua, our team has repaired and maintained thousands of heat pump systems. We're the go-to local name for reliable, high-efficiency heating and cooling.

🔧 Time to Call in the Experts?

If your heat pump isn’t performing like it used to—or it’s completely down—don’t wait until it gets worse. The sooner you get it checked out, the easier (and cheaper) the fix is likely to be.

📍 Denommee is your local, trusted HVAC contractor for heat pump service, repair, installation, and maintenance in Acton, Tewksbury, Burlington, Groton, Billerica, Concord, and Nashua.

Call us today at 978-649-8886 or text 857-226-9140 to instantly schedule your diagnostic or seasonal maintenance!

 

Author

Our Latest Articles