Our Services
HVAC Service, Repair & Diagnostics
Honest diagnostic and repair work on existing heating and cooling systems for homes and businesses across Hampton Roads and Northeastern North Carolina.
When your heat or air conditioning isn't working right, you want someone who will find the real problem, explain it clearly and fix it properly. That's how Hal Nystrom has built H&S Mechanical's reputation over more than 25 years in the HVAC trade.
We diagnose and repair air conditioners, heat pumps, furnaces, gas packs, ductless mini-splits and light commercial equipment. If a repair makes sense, we'll fix it. If your system has reached the point where replacement is the better investment, we'll tell you why and let you decide.
We also provide system cleanings and check-ups to help catch small problems before they turn into breakdowns.

Common problems we diagnose
- AC not cooling or blowing warm air
- Heat pump not heating
- Water leaking from the indoor unit
- System won't turn on or keeps shutting off
- Frozen coils or ice on the unit
- Strange noises, odors or tripped breakers
What to expect from us
- A clear explanation of what's wrong
- Your options laid out before any work is done
- Straightforward pricing and no high-pressure sales
- Professional, respectful service in your home or business
- Your system tested to make sure it's working before we leave
Related Services
More ways we keep you comfortable
HVAC System Replacement
Full heating and cooling system replacements, sized for your home and installed right.
Learn moreHeat Pump Installation & Replacement
Efficient heating and cooling from one system — ideal for our mild coastal winters.
Learn moreIndoor Air Quality Solutions
Air purification, filtration upgrades, UV lights and humidity control.
Learn more
FAQ
HVAC Service, Repair & Diagnostics: common questions
Straight answers from our team. Have another question? Give us a call.
Yes. We diagnose and repair most residential and light commercial heating and cooling equipment, regardless of who installed it.
The most common causes are a clogged condensate drain line, a cracked drain pan or a frozen coil that's melting. If water is pooling, turn the system off and give us a call so we can find the cause.
Common causes include a dirty air filter, a dirty or frozen coil, low refrigerant from a leak, or a failed capacitor or fan motor. Check your filter and thermostat settings first; if that doesn't fix it, call us for a diagnosis.
Most manufacturers recommend professional maintenance at least once a year, and many heat pump owners schedule a check-up before both the cooling and heating seasons. Regular cleanings help your system run efficiently and last longer.
Service Areas
Where we work
Serving homeowners and businesses throughout Hampton Roads and Northeastern North Carolina.
Ready for a New HVAC System?
Planning a system replacement, heat pump upgrade, mini-split installation, or light commercial HVAC service? Our family-owned team is ready to help you find the right solution.
- Licensed & Insured HVAC Contractor
- Serving VA & NE North Carolina
- Financing Available
