Same-Day Service
Most service calls handled same-day across the Denver metro — and we answer the phone 24/7.
Denver's Boiler Repair Specialists
Radiant Heat Is Comfortable and Efficient — When Your Boiler Is Running Right
Boilers are reliable, long-lived systems, but when something goes wrong — a leaking zone valve, a failed circulator pump, or pressure that won’t hold — they need a technician who actually knows hydronic and steam systems, not someone who works on forced-air furnaces all day and treats your boiler as an afterthought. Done has been servicing boilers across the Denver metro since 1999, and our team understands the nuances of both hot water and steam systems, including the older cast-iron units common in Denver’s historic neighborhoods.
Whether you’ve lost heat to one zone or your entire system is down, we diagnose the problem accurately and fix it right. Explore our full heating services or call 833-539-9153 to schedule a boiler repair visit — we’re available 24/7 for emergencies.
- Hot Water and Steam Systems We service both hydronic hot water boilers and older steam systems — including the single-pipe and two-pipe steam setups common in Denver's century-old homes.
- Zone-Level Diagnostics Lost heat in one room or one floor? We trace zone valve failures, air locks, and piping issues to find exactly where the system broke down.
- Available 24/7 Boiler failures don't stick to business hours. We offer around-the-clock emergency service so you're never stuck in a cold house waiting until Monday morning.
Signs Your Boiler Needs Repair
Boilers Give Warning Signs — Here's What to Watch For
Boilers rarely fail without warning. If you're noticing any of these issues, it's time to call a technician before a minor problem becomes a major one.
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Leaking or Pooling Water
Water around your boiler base, near relief valves, or at pipe fittings points to a pressure issue, a failed valve, or a corroded fitting. Even a slow drip should be evaluated promptly to avoid water damage.
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Pressure Too High or Too Low
A healthy hot water boiler typically operates between 12 and 25 psi. Pressure outside that range — especially if the relief valve is venting — means something in the system needs attention.
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Uneven Heat Between Zones or Rooms
If some radiators or baseboard units are cold while others are hot, you may have a stuck zone valve, a failing circulator pump, or air trapped in the lines blocking flow.
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Banging, Gurgling, or Kettling Noises
Loud sounds from your boiler or pipes — knocking when the system fires, gurgling in the lines, or a rumbling kettle sound — often indicate air in the system, scale buildup, or a circulation problem.
Boiler Repairs We Handle
Full-Service Boiler Repair for Hot Water and Steam Systems
Our technicians carry diagnostic tools and common parts for the most frequent boiler failures. Here's what we repair:
- Circulator Pump Replacement The circulator pump moves heated water through your system. When it fails, heat stops reaching your living spaces. We test, replace, and verify proper flow so every zone heats evenly.
- Zone Valve Repair and Replacement Zone valves control heat flow to individual areas of your home. A stuck-open or stuck-closed valve causes uneven temperatures or wasted energy. We service all common valve brands and replace when needed.
- Expansion Tank and Pressure Relief A waterlogged expansion tank causes pressure spikes that trigger your relief valve. We test tank pressure, replace failed tanks, and ensure your system holds proper pressure safely.
- Burner, Ignition, and Aquastat Service From burner assembly cleaning and ignition failures to aquastat calibration and gas valve replacement, we handle the combustion and control side of your boiler as well as the distribution system.
Our Boiler Repair Process
Methodical Diagnosis, Lasting Repairs
Boiler systems are more complex than forced-air furnaces. We take a systematic approach to find the real cause — not just the obvious symptom.
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Call or Schedule Online
Reach us at 833-539-9153 or book through our website. Tell us what you're experiencing and we'll schedule a visit — same day when available, or emergency dispatch for no-heat situations.
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System-Wide Inspection
Our technician evaluates your entire system — boiler, expansion tank, circulator, zone valves, piping, and controls — not just the obvious point of failure. Boiler problems are often interconnected.
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Clear Explanation and Upfront Quote
We explain what we found in plain language, walk you through the repair options, and give you a firm price before touching anything. No guesswork, no hidden charges.
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Repair and Full System Test
After the repair, we run the boiler through a complete cycle, check pressures, verify zone flow, and confirm every part of the system is operating as it should before we pack up.
Current Specials
Save on the work your home needs most.
Why Choose Done
Upfront Pricing
Flat-rate pricing approved before work begins — no surprises on the invoice.
Licensed & Insured
Fully licensed, bonded, and insured — plumbing, HVAC, and electrical under one roof.
Satisfaction Guaranteed
If it isn't right, we make it right — backed by our workmanship guarantee.
Boiler Problems Don't Get Better on Their Own
Call 833-539-9153 or schedule online. Done has been keeping Denver homes warm since 1999 — let's get your boiler back in shape.
What Our Customers Say
Don't just take our word for it — hear from our satisfied customers
★★★★★
Zach provided outstanding service today! He was friendly, professional, and took the time to explain everything about my AC in a way that was easy to understand. He answered all of my questions thoroughly and never made me feel rushed. I really appreciated how informative and helpful he was throughout the entire visit. Excellent customer service—I highly recommend !
★★★★★
Very impressed by the professionalism and knowledge of Done! Zach came out on a Sunday morning, took the time to evaluate the unit as a whole, explained the issue, and readily corrected the sensor problem with my AC/furnace. Highly recommend!
Maintenance Membership
Join the Care Club
Total home service care, on a schedule.
Members get priority scheduling, seasonal HVAC tune-ups, an annual plumbing & electrical safety inspection, and exclusive discounts — for less than the cost of a single emergency call.
- Priority scheduling
- Seasonal HVAC tune-ups
- Annual safety inspection
- Exclusive member discounts
- Free dispatch on repairs
- No long-term contracts
Frequently Asked Questions
How do I know if I have a hot water boiler or a steam boiler?
Look at your radiators. Steam radiators have a small air vent on the side (a little metal valve) and only one pipe connection at the bottom. Hot water radiators typically have two pipe connections and no air vent. If you have baseboard heating with fins inside metal covers, that’s almost always a hot water system. Not sure? Our technician can identify your system type on arrival.
My boiler is old — should I repair it or replace it?
Age alone isn’t the deciding factor. Many cast-iron boilers last 30 or even 40 years with proper maintenance. We consider the cost of repair relative to the system’s remaining life, its efficiency, and whether parts are still available. We’ll give you an honest assessment — including when replacement makes more sense financially — rather than pushing you toward the higher-ticket option.
Can you service my boiler if it's an older or less common brand?
In most cases, yes. Our technicians are experienced with a wide range of boiler manufacturers including Weil-McLain, Burnham, Peerless, Slant/Fin, Utica, and others. For very old systems with discontinued parts, we’ll be honest about what’s available and what your options are before proceeding.
How often should a boiler be serviced?
Annual maintenance is the standard recommendation for most boilers. A yearly tune-up typically includes burner inspection and cleaning, flue inspection, pressure and relief valve testing, and circulator and zone valve checks. Regular service catches small problems before they become expensive failures and keeps your system running efficiently all winter. Ask us about our Care Club maintenance plan for ongoing coverage.
*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
