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Welzig Heating, Air, Plumbing & Electric

Plumbers in Longmont, Colorado
Ranked #3 in Longmont | Grade A-
4.90 (1,557 reviews)

Welzig Heating, Air, Plumbing & Electric

Welzig Heating, Air, Plumbing & Electric serves Longmont, Colorado homeowners with repair, replacement, and maintenance for HVAC, plumbing, and electrical systems. Technicians focus on clear communication, options-based estimates, and efficient completion.

Welzig Heating, Air, Plumbing & Electric business photo 1 - Plumbing in Longmont
Welzig Heating, Air, Plumbing & Electric business photo 2 - Plumbing in Longmont
Welzig Heating, Air, Plumbing & Electric business photo 3 - Plumbing in Longmont
Welzig Heating, Air, Plumbing & Electric business photo 4 - Plumbing in Longmont
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Why Homeowners Choose This Business

Responsive scheduling, technicians who explain findings and options, upfront pricing, and tidy work. A local Longmont, Colorado shop with strong customer feedback for accuracy of diagnosis and efficient repairs.

Service Area

Serving Longmont, Colorado and surrounding neighborhoods across Boulder County and nearby communities.

Featured Local Business

This featured listing includes fuller business details and a stronger local presentation for homeowners comparing nearby options.

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Listing details

This listing includes service information, customer review signals, a photo gallery, and public contact details to help homeowners compare this business more easily.

Featured listings may appear with fuller business details and stronger local presentation.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

A quick local comparison based on review strength, business detail, and local service fit.
  • Maintains a competitive standing in this market.
  • Performs at or above the local average rating.
  • Has more review volume than many local competitors.
  • Shows strong customer satisfaction signals based on review quality and volume.

Trust Signals

Emergency Service - Phones answered 24/7 with urgent service scheduling available.

Services Covered

  Electrical Services
  Plumbing Services
  Renovation Services
  Furnace Repair
  AC Repair
  Installations
  Heat Pump Installation
  Repairs
  Water Heater Replacement
  Drain Cleaning
  Leak Detection
  Electrical Troubleshooting
  Panel Upgrades
  Ductless Mini-Splits
  Hvac Maintenance
  Indoor Air Quality
  Thermostat Installation

Heating and cooling repair, replacement, and maintenance; water heater service and replacement; drain clearing and leak repair; basic electrical troubleshooting and fixture replacements; indoor air quality solutions; seasonal tune-ups; new equipment estimates.

Reviews

Customer Reviews

Bob Hayes
This is the second time I’ve called Welzig and I’ve been satisfied both times. First was for a heating issue a couple years ago and this time for air conditioning. Prices seem reasonable and service is quick, professional and thorough witho…
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This is the second time I’ve called Welzig and I’ve been satisfied both times. First was for a heating issue a couple years ago and this time for air conditioning. Prices seem reasonable and service is quick, professional and thorough without any arm twisting to spend more money. HVAC technician Allen was extremely friendly and helpful, clearly explaining what was going on and giving me good advice for the future while getting my a/c unit working the way it should. Plus my dog liked him, that’s always a good sign! Highly recommended!!
Kemmery Hill
We had an outstanding experience with Welzig Heating, Plumbing and Cooling! We woke up to no hot water and called first thing in the morning. By that afternoon, we had a brand-new water heater installed and everything was up and running aga…
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We had an outstanding experience with Welzig Heating, Plumbing and Cooling! We woke up to no hot water and called first thing in the morning. By that afternoon, we had a brand-new water heater installed and everything was up and running again. The responsiveness and efficiency were incredible.

Our technician, Kody Smith, was exceptional. He was professional, knowledgeable, and took the time to walk us through every step of the process, explaining our options and answering all of our questions without ever making us feel rushed. His patience and attention to detail gave us complete confidence in the work being done.

As an added bonus, Kody was so kind and patient with our very inquisitive French Bulldog, who insisted on supervising the entire installation! His friendly demeanor made the whole experience even better.

If you’re looking for honest, professional, and prompt service, I can’t recommend Welzig Heating, Plumbing and Cooling highly enough. Thank you, Kody, for turning a stressful morning into such a positive experience!
Robert Guinee
Dan Hogan came out on the hottest day of the year to perform a repair on my A/C system. I was pleased with the accuracy with which he diagnosed my problem. He offered me a couple of different options for fixing it, since I had expressed th…
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Dan Hogan came out on the hottest day of the year to perform a repair on my A/C system. I was pleased with the accuracy with which he diagnosed my problem. He offered me a couple of different options for fixing it, since I had expressed that I might do it myself if it was simple enough. Long story short, I opted to let him fix it, which he did in short order, and then he spent extra time validating that his fix did the trick. I am writing this review a day after his visit, and I can say that my system is good to go. Would I have liked to spend a little less? Well, yeah. But I have good A/C function during an incredibly hot spell, so I am satisfied, and in fact downright happy. Thanks Welzig, and thanks Dan!
Catherine B
I needed a plumber to come out to my house on a Saturday to address a leak. I called Welzig and they responded right away and were able to send someone out within an hour. Kody was very professional and helpful. I’m so glad I didn’t spend h…
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I needed a plumber to come out to my house on a Saturday to address a leak. I called Welzig and they responded right away and were able to send someone out within an hour. Kody was very professional and helpful. I’m so glad I didn’t spend hours trying to call other businesses. And it was affordable.
Radford On The River
Shane did a great job with our plumbing issue. We had actually called Welzig for a second opinion after receiving service and a quote from a different company. The diagnosis was that there was a broken pipe that would require jackhammering…
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Shane did a great job with our plumbing issue. We had actually called Welzig for a second opinion after receiving service and a quote from a different company.

The diagnosis was that there was a broken pipe that would require jackhammering, replacement, and many thousands of dollars in cost. Shane on the other hand was able to quickly and more accurately diagnose the problem as a clog, clear it, and scope the pipe to give us an idea of the potential longevity of our older pipes, all for a fraction of the cost.

We’re very happy with Shane and the service we received from Welzig. It potentially saved us thousands of dollars and days of frustration.

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Special Offers

Emergency Service

Emergency service may be available for urgent issues.

Frequently Asked Questions

Yes, the office answers calls at all hours and can schedule urgent visits, including weekends. Availability for after-hours dispatch may vary by workload and service type.

Technicians service most major residential HVAC brands commonly found in Longmont, Colorado homes. During the visit, they’ll review your model and discuss the best repair or replacement options.

Same-day water heater replacement is often possible when scheduling and inventory align. The team will confirm availability, provide pricing, and handle permitting requirements as needed.

Yes, technicians explain the diagnosis and present pricing before starting work. They can offer multiple options when applicable so you can choose what fits your needs.

Yes, electricians can diagnose common household electrical issues and replace fixtures and devices. For larger projects, they will review scope and provide a detailed estimate.
 Verified Listing

Opening Hours

  • Monday Open 24 hours
  • Tuesday Open 24 hours
  • Wednesday Open 24 hours
  • Thursday Open 24 hours
  • Friday Open 24 hours
  • Saturday Open 24 hours
  • Sunday Open 24 hours

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Business Details

Business Rating
4.90 (1,557 reviews) Featured BusinessPro Listing
Address
1831 Boston Ave, Longmont, CO 80501
Business Type
Plumber
Website
https://welzig-heating-and-air.com/our-service-area/longmont-co/
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