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Master Plumbing, Heating & Air Master Plumbing, Heating & Air
$50 OFF Water Heater Repair

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Valid Dec 1, 2025 - Nov 30, 2026

Marion AC Company

Get Real Comfort Out of Your AC System This Summer

Comfort in a Marion summer comes down to more than turning the AC on and hoping for the best. The right system, properly sized and maintained, makes a home feel genuinely comfortable rather than just less hot.

That's what Master Plumbing, Heating & Air has been helping homeowners achieve since 1986. Our technicians are fully licensed, extensively trained, and held to a consistent standard on every job. Every visit comes with a satisfaction guarantee and warranties because we want you to feel confident long after we've left.

Let’s get your AC system back on track. (319) 214-5064 or schedule online to book service from a locally owned, veteran-founded team.

Residential AC Services

Master Plumbing, Heating & Air handles the full range of residential air conditioning needs across Marion, from urgent repairs to carefully planned installations. Here's what we offer:

  • AC Repair
  • AC Maintenance
  • AC Installation
  • Air Handlers
  • Ductless Air Conditioning
  • Refrigerant Leak Detection and Recharging

How We Determine the Right AC System for Your Home

Replacing an AC system isn't just a matter of finding a unit the same size as the one being removed. A system that isn't correctly matched to the home it's cooling will underperform regardless of its efficiency rating on paper. Here's how we approach it:

  • We assess the home before recommending equipment. Square footage, ceiling height, insulation quality, window exposure, and existing ductwork all affect how a system needs to be sized and configured. We look at all of it before making a recommendation.
  • We account for Marion's climate. Iowa summers bring both heat and significant humidity, and a system that handles temperature well but struggles with moisture control will leave a home feeling uncomfortable even at the right temperature. Humidity management is part of what we factor into system selection.
  • We consider what the existing infrastructure can support. In older homes, ductwork, electrical systems, and refrigerant lines may need attention alongside a new installation. We assess what's already there so there are no surprises once the job is underway.
  • We present options across a range of budgets and efficiency levels. We install and service Lennox AC systems, which rank among the most energy-efficient options available, alongside all other major brands. Our goal is to find the system that delivers the best real-world performance for your specific home rather than defaulting to the easiest or most expensive option.
  • We size every installation around today's home, not the previous unit. The system that was installed ten or fifteen years ago may not have been correctly sized to begin with. We start from the home's actual requirements rather than treating the old unit as the benchmark.

Frequently Asked Questions

My AC is running but the house still feels humid and uncomfortable. What's going on?

Humidity control is one of the primary functions of a properly working AC system, and it's often where aging or improperly sized systems fall short. Our technician can assess whether the issue is with the system itself or whether a supplemental dehumidifier would address the problem more effectively.

How do I know if my AC system is the right size for my home? 

We assess sizing as part of every installation and can evaluate an existing system if you suspect it may not be correctly matched to your home.

Do you handle refrigerant in-house? 

Yes, it's handled entirely in-house. Low refrigerant almost always means a leak, and we locate and address the source before recharging the system. Topping off without fixing the leak first just delays the same problem returning.

Is there a fee for the initial visit? 

Yes, there's a diagnostic fee for the initial visit. You'll know the amount before we arrive, and once we've taken a look, you'll have a complete price for the work before we ask you to commit to anything.

What should I do if my AC stops working during a heat stretch? 

Call us as soon as the problem surfaces and we'll work to get someone out to you as quickly as possible. In the meantime, close blinds and curtains on sun-facing windows to reduce heat gain, limit heat-generating appliances where possible, and keep doors closed to concentrate whatever cool air remains in the rooms you're using.

  • Respectful & Tidy

    Our pros treat your home like their own, wearing shoe covers and leaving every work area spotless.

  • Award-Winning Service

    Recognized 5 times by Angie's List for outstanding service, we go above and beyond to deliver exceptional results every time.

  • Transparent, Upfront Pricing

    No surprises, no hourly tricks. You’ll know the cost before we start, so you can make confident decisions.

  • Fast, Same-Day Solutions

    Plumbing and HVAC issues can’t wait. We get you back on track quickly with prompt, same-day service.

Decades of Service, Thousands of Smiles

Hear from the homeowners and businesses who rely on us for expert solutions.
    My entire experience with Master Heating, Plumbing, and Cooling was a 10 out of 10.
    “Bill M was my service tech, I don’t know if he was a plumber but he certainly installed my sump pump with absolutely no problem. He explained to me in the beginning that my sump pump “could fail” but did not try and pressure sales me into anything. What he said made me comfortable in his knowledge and I trust him. I did not get the idea that he was just trying to make the company money by upselling to me either. So exceptional work from Bill M. I’d also like to say I had a couple interactions with the office staff as well. Taylor and Allie are top notch as well. My entire experience with Master Heating, Plumbing, and Cooling was a 10 out of 10. I will continue to use them in all my heating, plumbing and cooling issues that arise.”
    Michael S.
    We feel confident with this team to help us!
    “We had a problem with our HVAC system leaking from the condensate and the blower and Matthew E was the best person for the job! He was professional, quick, and helped us understand what went wrong and got the items replaced in no time! We signed up for the Green Club for regular maintnence.”
    Kendal A.
    I would 100% recommend Master Plumbing Heating and Cooling
    “I called in the AM regarding our central air not working and spoke with Taylor who was so friendly and let me know they had an appointment in the afternoon. Maddie then kept in contact with me as to when Madison & Jordan would arrive. Madison and Jordan were very friendly and got to work right away and had the unit working quickly. Everything went smoothly and I cant say enough about every person I was in contact with. Such a great experience! Thank you all so much!”
    Denise E.
    10/10 recommend this place!
    “Bill was outstanding! Very fast, no frills or upsells 10/10 recommend this place! Join the membership too- pays for itself in one visit!”
    Shawn G.
    Thank you!
    “Very professional service. Both guys were very understanding and answered all our questions. I highly recommend. Appreciate the great communication too when they let us know they were coming over and when they finished the job. Also thought it was kind they offered to sweep up the area. Thank you!”
    Jayna A.
    I highly recommend!
    “I am happy to share that the team at Master Plumbing, Heating & Cooling responded quickly to repair my furnace. The service technicians (Brett & Jordie) were friendly, informative, and fast. They left the furnace room cleaner than they found it.”
    Donald B.
    Very happy with my new water heater and installation!!
    “John provided prompt and excellent service as always and I appreciate the follow-up to see if I have any questions. Very happy with my new water heater and installation!! Thanks again to Maddie who is always courteous and great with scheduling!”
    Lisa K.
    Would highly recommend!
    “Bill M was my service technician. Very thorough and explained everything so I understood. Gave tips on future maintenance and did a great job of getting the new water heater installed and the old removed in a very timely manner as well as any cleanup.”
    Becky W.
    I will definitely recommend this company!
    “We had a water softener installed. I called Master Plumbing, Heating, and Cooling at about 8AM and we had a water softener installed by 12:15. Bill was our service technician. He was so very polite and respectful of our home! ( He wore shoe coverings) Bill explained everything extremely well. We bought their Green Club Membership, for a few dollars more, which will cover plumbing, heating, and cooling. Our systems are well over 25 years old, so over the long run this membership will save us a lot, Thank you Bill and Master Plumbing, Heating & Cooling.”
    Diana P.