Goffstown, NH Heat Pump Troubles? 5 Cooling Fixes

Estimated Read Time: 9 minutes

Heat pump not cooling your home like it should? You are not alone. From Nashua to Manchester and Derry, we see the same handful of issues cause weak or warm airflow. In this guide, you will learn the top reasons a heat pump stops cooling, simple checks you can try today, and when to call Paul The Plumber for fast, warranty-backed repairs. Ask about $100 off heat pump installs.

1) Thermostat or Mode Settings Are Off

Before you assume a major failure, confirm the basics. Make sure the system is in Cool mode, the set point is at least 3 degrees below room temperature, and the fan is set to Auto. On many inverter and ductless systems, Dry or Heat can run quietly and still move air, but they will not lower temperature.

Quick checks you can try:

1. Verify Cool mode, not Heat or Dry.
2. Replace thermostat batteries and check the date and time settings.
3. Confirm the indoor unit louver is open and not pointed at sensors.
4. For multi‑zone mini splits, make sure all heads are not competing with each other on different modes.

If you recently had a power outage, cycle power at the disconnects for both indoor and outdoor units, wait 5 minutes, then restart cooling. Some systems need a short reset to resync communications between components.

Callout from local homeowners:

"Paul the Plumber installed our AC mini split system two years ago and we have been very happy with every aspect of the job - from sales to installation to yearly service!"

2) Airflow Problems: Dirty Filters and Coils

Restricted airflow is the most common reason a heat pump runs but does not cool. Dirty filters, clogged return grilles, blocked wall cassettes, and matted outdoor coils starve the system of air. That leads to poor heat exchange, higher humidity, and long run times.

What to do now:

1. Replace or wash filters. In allergy season around Salem and Andover, check them monthly.
2. Clear 2 feet of space around outdoor units. Trim shrubs and remove grass clippings from the coil face.
3. Vacuum return grilles and ensure furniture is not blocking them.
4. For ducted systems, look for collapsed flex duct or closed dampers in the basement or attic.

What our maintenance includes so you do not have to guess:

• "Thoroughly inspect your heat pump for any potential issues"
• "Clean and lubricate moving parts to reduce wear and tear"
• "Test electrical connections and refrigerant levels"
• "Replace air filters to improve indoor air quality and system efficiency"
• "Provide personalized recommendations for optimal system performance."

Homeowner voice:

"I wish I could give more than 5 stars!! They installed a four unit mini-split system. The process and people from the initial consultation, to financing and installation were professional, friendly, and helpful."

3) Low Refrigerant or a Refrigerant Leak

Your heat pump needs the correct refrigerant charge to absorb and reject heat. A slow leak can go unnoticed until a hot day exposes it. Signs include ice on the indoor coil, a hissing sound, short cycling, and lukewarm air with normal fan speed.

What you can check safely:

1. Look for frost on the refrigerant lines at the outdoor unit after 15 minutes of cooling.
2. Check the condensate drain. A dry pan while the system runs could mean little to no heat removal.
3. Note any sudden drop in performance after a recent service or move of linesets.

Why professional service matters:

• Accurate diagnosis requires gauges, temperature clamps, and a digital scale.
• Leak detection may involve nitrogen pressure testing or electronic sniffers.
• Adding refrigerant without fixing the leak is a short-term fix and risks compressor damage.

Paul The Plumber’s approach uses "the latest tools and technology to accurately identify the problem and provide effective solutions" and we install only "high-quality replacement parts to ensure lasting repairs."

Customer experience:

"We recently had 3 ductless mini splits installed in our tri level home in Hampton. Paul the Plumber was an amazing company to work with for this project! They were kind, communicative, professional, informative and more than I expected."

4) Frozen Outdoor Unit or Defrost Problems

In cooling season, you should never see the outdoor coil iced over. Ice means the system is not exchanging heat. This can happen after a storm, with clogged coils, or with a control board or sensor problem. In coastal Seacoast towns, salt and pollen can cake onto fins faster, which speeds up icing.

Steps to take:

1. Turn the system Off and let ice melt. Do not chip ice with tools.
2. Rinse the outdoor coil from the inside out with gentle water pressure. Avoid bending fins.
3. Restart in Cool and observe the fan and compressor. If ice returns quickly, stop and call a pro.

Control issues to consider:

• Faulty outdoor fan motor or capacitor reduces airflow across the coil.
• Failed sensor or control board can misread temperatures.
• On ductless systems, a sticky expansion valve can starve refrigerant flow.

Real-world fix from our team:

"Would reccomend, Had a very strange problem with minisplit head units freezing up. Had a few hvac specialists stumped from other companies before calling Ben Davis and Kyle from PTP who figured out a quick fix."

5) Mechanical Failures: Reversing Valve, Compressor, or Capacitors

When the basics check out but your heat pump still will not cool, internal components may be at fault.

Common culprits:

1. Reversing valve stuck in heat mode. The system runs but only moves warm air.
2. Weak start or run capacitor. Outdoor fan spins slowly or needs a manual push.
3. Failing compressor. You may hear clicking or humming with no cooling, and high energy bills.

These parts require proper diagnosis and safe handling. Our licensed and background-checked technicians provide upfront pricing and no hidden fees, so you know the repair cost before work begins. If your unit is older, a replacement can be smarter. "All of our heat pump installations come with a 2-year parts and labor warranty, giving you peace of mind. Plus, if you become a club member with us, you’ll receive an extended 3-year parts and labor warranty."

Preventive Maintenance That Protects Cooling Performance

Routine care avoids most cooling complaints and keeps efficiency high during July heat waves in Lawrence, Haverhill, and Methuen.

Seasonal essentials:

1. Spring tune-up before the first 80-degree day.
2. • Clean indoor and outdoor coils.
   • Confirm refrigerant charge and inspect for leaks.
   • Test electrical components and tighten connections.
2. Mid-season filter changes.
3. • Replace or wash filters every 1 to 3 months depending on pets and pollen.
3. Outdoor unit care.
4. • Keep 2 feet of clearance and elevate if your yard puddles after storms.
4. Professional check each year.
5. • Document performance and small wear items before they become breakdowns.

With Paul’s Promise Plan, you get priority scheduling and discounted repairs, so your system gets help fast on the hottest days.

Repair or Replace: Make the Right Call

Consider repair when:

1. The system is under 10 years old and has a single, isolated issue.
2. The refrigerant leak is small and accessible.
3. Parts are in stock and labor is modest.

Consider replacement when:

1. The compressor or reversing valve has failed on an older unit.
2. You face repeated leaks or control board failures.
3. Cooling bills keep rising and comfort is still poor.

Our install process includes expert load sizing, clean workmanship, and post-install walkthroughs. We offer upfront pricing and protect your investment with strong warranties. Current promotion: $100 off heat pump installs. Ask for details.

Why Homeowners in Southern NH Choose Paul The Plumber

• Family-owned and operated for over 22 years across southern NH, the Seacoast, and the greater Concord area.
• BBB accredited with an A+ rating and thousands of verified 5-star reviews across multiple platforms.
• Licensed and background-checked technicians who respect your home, wear shoe covers, and communicate clearly.
• Upfront pricing with no hidden fees. You approve the work before we start.
• Strong warranty protection on installations, with extended coverage for club members.
• Local insight that matters in Nashua, Manchester, Derry, Salem, and Andover. We account for seasonal pollen, coastal salt, and attic heat that affect your heat pump’s performance.

Special Offer: Save $100 on Heat Pump Installs

Save $100 on heat pump installations with Paul The Plumber. Mention this offer when you book before 2025-11-05.

Terms summary: Coupons and special offers cannot be combined. Valid on standard pricing only. Limit one per household. Coupon must be presented and mentioned before work begins.

Frequently Asked Questions

Why is my heat pump running but not cooling?

Usually incorrect mode settings, dirty filters, or low refrigerant. Start by confirming Cool mode and replacing filters. If airflow is good and air is still warm, schedule a diagnosis.

How often should I change my heat pump filter in southern NH?

Every 1 to 3 months. During high pollen in Nashua and Salem, monthly changes keep airflow strong and cooling efficient.

Can I hose off my outdoor unit to improve cooling?

Yes, a gentle rinse from the inside out helps. Turn power off first and avoid bending fins. Do not use high pressure.

Is it worth repairing a heat pump with a refrigerant leak?

If the unit is newer and the leak is accessible, repair can make sense. Repeated leaks or a failing compressor often justify replacement.

What warranty do you provide on new heat pump installs?

All installations include a 2-year parts and labor warranty. Club members receive an extended 3-year parts and labor warranty.

A heat pump not cooling usually comes down to settings, airflow, refrigerant charge, icing, or a worn component. Tackle the simple checks, then lean on our licensed team for precise testing and a clear plan. For homeowners in southern NH searching for help with a heat pump not cooling, we are ready to respond with upfront pricing and strong warranties.

Call Paul The Plumber at (603) 541-7986 or schedule at https://www.paultheplumbernh.com/.

Ask about $100 off heat pump installs before 2025-11-05. Join Paul’s Promise Plan for priority service and extra warranty protection. Get your home cool and comfortable today.

Paul The Plumber is a family-owned HVAC and plumbing company serving southern NH, the Seacoast, and greater Concord for over 22 years. We are BBB accredited with an A+ rating and have thousands of verified 5-star reviews. Expect licensed, background-checked technicians, upfront pricing, and strong warranties. Installations include a 2-year parts and labor warranty, or 3 years for club members through Paul’s Promise Plan. Local, trusted, and customer-first.