Commercial Heat Pump Repair | Greater Seattle

Same-day scheduling when capacity allows, with priority for no-heat and business-down heating situations—aligned with how we describe service on the A/C Dr. Naz homepage.

RTU economizer and sensor logic diagnostics

Commercial heat pump repair in the field

Recent commercial heat pump service in Greater Seattle — packaged heat pump rooftops, ducted splits, and reversing-valve equipment for offices, retail, and tenant floors.

Commercial heat pump repair field photo 1 — Greater Seattle — Commercial heat pump rooftop service

Commercial heat pump repair field photo 2 — Greater Seattle — Packaged heat pump RTU repair

Commercial heat pump repair field photo 3 — Greater Seattle — On-site commercial heat pump repair

Common Commercial Heat Pump Failure Scenarios

We troubleshoot with electrical checks, airflow and static pressure testing, refrigerant-side evaluation when applicable, and control logic reviewed against the unit’s sequence of operation—so repairs target the actual fault instead of guess-and-replace.

What we see most on commercial heat pumps in the Seattle area

Reversing valve stuck or slow to shift—heat mode never engages or cooling persists in winter
Defrost board or sensor faults that ice the outdoor coil and trip heat lockouts
Auxiliary heat strips, sequencers, or lockouts that leave tenants with no heat
Outdoor coil restrictions, fan failures, or low ambient lockouts in shoulder seasons
Thermostat, sensor, or BAS mode commands that never call for heat when needed

How we explain the diagnosis

You get plain-language updates tied to what we measured and what the controls are commanding—useful for facilities teams deciding whether to repair now, stage a capital replacement, or adjust setpoints and schedules without masking a deeper issue.

Commercial AC compressor electrical troubleshooting

Commercial heat pump reversing valve service

Make-up air (MUA) system blower diagnostics

Total external static pressure testing

Seattle-area commercial rooftop unit (RTU) repair

Technical FAQ & field report index

      EXCELLENT  
   Based on 12 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Purita J 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great company and great owner! The owner of this business responded to our request very fast at night time when our commercial walk-in refrigerator broke down. He and his team helped fix our walk-in refrigerator the next day. Now it has been many months since we got the walk-in refrigerator fixed by this company, the refrigerator still works great!
  
 
      Posted on Google  
   
   Mack G 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great to work with, quick and responsive. Highly recommend.
  
 
      Posted on Google  
   
   Judy H 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very responsive and knowledgeable.  Resolved both my cooler and keg cooler issues in a timely manner. I will use him everytime I have an issue
  
 
      Posted on Google  
   
   The A 
 
 
 
 Trustindex verifies that the original source of the review is Google. My walk-in cooler broke down on us Friday night. I called Dr. Naz, and he showed up a couple of hours later and figured out the problem. He said he'd contact me with estimate first thing in the morning on Monday, and he actually did. He offered to replace our evaporator by Wednesday, and yep, he did it. He really knows his stuff and keeps his word. You can totally rely on him for your service needs. His price was fair, no hidden fees, and it even came with his own 1-year warranty. Highly recommend him; he's my go-to cooler guy now.
  
 
      Posted on Google  
   
   Inu Y 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very dependable and timely service
  
 
      Posted on Google  
   
   Ivan I 
 
 
 
 Trustindex verifies that the original source of the review is Google. Nazar did an excellent job repairing the refrigerator at my restaurant in Seattle. He was very responsive and was able to schedule a same-day diagnostic, which was a huge help. The repair was handled quickly and professionally. I highly recommend A/C Dr. Naz to anyone who needs reliable commercial appliance repair.
  
 
      Posted on Google  
   
   Vagif Z 
 
 
 
 Trustindex verifies that the original source of the review is Google. We hired them for a commercial freezer installation and couldn’t be happier. Communication was clear, pricing was fair, and the installation was completed smoothly with great attention to detail. They tested everything thoroughly and explained the setup clearly. Highly recommended for any commercial refrigeration needs.
  
 
      Posted on Google  
   
   Rifat B 
 
 
 
 Trustindex verifies that the original source of the review is Google. Naz, Excellent service! Very knowledgeable, professional, and reliable. He diagnosed the refrigeration issue quickly and explained everything clearly. The repair was done efficiently, and everything has been working perfectly since. Fair pricing and great attention to detail. I highly recommend him to anyone needing refrigeration work.
  
 
      Posted on Google  
   
   Ytagesu H 
 
 
 
 Trustindex verifies that the original source of the review is Google. A/C Dr. Naz Is a great company to work with. Especially, Nazar is a great person to contact for our repair needs.
  
 
  
  
 
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Commercial heat pump repair field photo 9 — Greater Seattle — EPA-certified commercial HVAC/R

Commercial heat pump repair field photo 8 — Greater Seattle — Building heat pump equipment service

Commercial heat pump service areas

We dispatch commercial heat pump repair across Greater Seattle and Puget Sound. Coverage and arrival windows depend on call volume and parts—confirm your address when you call rather than assuming same-day service everywhere.

Need a city-specific page? Call (425) 535-8990 with the property city and equipment type (packaged heat pump RTU, ducted split)—we will confirm whether we can schedule the visit you need.

Commercial heat pump repair by area

(Call (425) 535-8990 to confirm timing for your address.)

Core metro & Eastside

Snohomish County & north

RTU economizer and sensor logic diagnostics · Compressor electrical troubleshooting · Heat pump reversing valve diagnostics

Commercial equipment and contexts we service

Typical calls involve packaged and split commercial heat pumps serving tenant floors, storefronts, kitchens that depend on makeup air, and back-of-house mechanical spaces—not single-family home split systems sold through retail “AC tune-up” channels.

Systems & assemblies

Rooftop units (RTUs) and packaged gas/electric or heat pump equipment
Commercial split systems: air handlers, condensing units, and line sets (as installed)
Blower assemblies, belts/pulleys or direct drive, and filter banks
Condenser coils and outdoor airflow restrictions that drive trips

Controls & comfort complaints

Zone temperature complaints traced to staging, sensors, or schedules
Economizer and mixed-air logic (site-dependent)
Heat pump and cooling lockouts, safeties, and intermittent faults
Static pressure and duct conditions that starve coils or rooms

Standards, same-day service, and how we think

Refrigerant work on applicable equipment follows EPA Section 608 requirements. Our Universal credential is summarized in plain language here: EPA Universal certification and HVAC/R standards (field note).

If you are comparing service models, this article explains how we think about same-day quality versus always-on marketing claims: Same-day heat pump repair vs. “24/7”—we focus on same-day when capacity allows, not a 24/7 promise on this page.

Diagnostics are guided by the equipment’s HVAC/R sequence of operation so we do not treat symptoms as root causes.

Technical field reports & facility diagnostics

The links below mirror the technical transparency section that already exists on this URL today—cleaned up for readability and aligned to commercial intent only.

Make-up air blower diagnostics · Static pressure testing · Full field report index

For indoor environmental quality context from authoritative sources, see the EPA indoor air quality overview and OSHA indoor environmental quality guidance—useful background when no-heat, lockout, or defrost complaints overlap with occupancy.

Heat pump repair vs. cooling-only AC

Walk-ins, ice machines, and line refrigeration live on our commercial refrigeration repair hub so Google and visitors get a clean split of intent: this page is building HVAC; that hub is refrigeration.