Boiler Service & Repair in Kalispell
Service, repair and tune-ups for residential heating boilers. We keep the system you have running safely and efficiently.
★ 5.0 · 44 Google reviews · Prefer to text? Text (406) 260-2952
Owner answers the phoneReeve picks up
24/7 · no after-hours upcharge
Licensed & insured
Boiler service you can follow
A lot of Flathead houses heat with hot water: a boiler, pumps, zone valves, and radiators, baseboard or in-floor loops. When heat dies in January, it's usually one of those pieces. We service residential heating boilers — diagnosis, repair, annual maintenance, and a plain-language read on what's worn and what can wait. We hold a Montana state boiler license.
What a residential boiler service includes
- Check system pressure cold and hot, and the expansion tank.
- Look for leaks at pumps, zone valves, relief valves, and fittings.
- Test circulator pumps and zone valves so every loop actually moves water.
- Inspect ignition, flame, and safety controls — including the pressure relief valve.
- Check combustion and venting. Carbon monoxide is not a paperwork item.
- On condensing boilers, clear and check the condensate drain and trap.
- Bleed air if rooms are cold and the boiler is fine.
- Tell you what is worn and what can wait until next season.
Common symptoms
Kettling (that rumble like a kettle), banging pipes, one cold zone, a relief valve that drips, or a boiler that locks out and needs a reset every night — those are all service calls. Call us before you keep resetting it.
Maintenance and tune-ups
Once a year, before heating season. Montana winters run a boiler hard. Waiting until the first no-heat night is how a $40 part becomes a freeze-up.
A tune-up is the service list above, done on a warm afternoon instead of at 11 p.m. We also look at short cycling, dirty strainers, and whether the fill valve is masking a leak.
Boilers can be part of a Comfort Club plan.
What Flathead neighbors say
★ 5.0 · 44 Google reviews · See all 44 reviews on Google
Reeve was on time, and completed the installation ahead of schedule. He is exceptionally skilled and knowledgeable. We highly recommend Reeve and the RJ HVAC team.
Kim P. · ★★★★★ · Oct 18, 2026 Fantastic to work with, would highly recommend. Reeve did a great job on our furnace and just a really nice guy.
Carrie A. · ★★★★★ · about 2 weeks ago Friendly , professional service. Not only did they fix my gas fireplace but they took the extra time to adjust all the setting so that the unit was functioning properly and safely! And all on a Saturday!
Tim H. · ★★★★★ · about 2 weeks ago Reeve as prompt, professional and an absolute pleasure to work with. He was knowledgeable and was able to diagnose my issues quickly and immediately addressed my needs. I would highly recommend RJ HVAC and will certainly use him in the future.
Brad G. · ★★★★★ · about a month ago
Reviews are shown exactly as posted on Google.
Questions
Why is my boiler not producing heat?
No heat is the most common boiler call. It can be as simple as a thermostat, a tripped switch, or low pressure — or it can be a pump, zone valve, ignition, or combustion problem. Don’t keep resetting a lockout. We’ll diagnose it and tell you what’s actually failed.
What pressure should my boiler be at?
Most residential hydronic boilers sit around 12–15 psi cold, and a bit higher when hot — often in the 18–25 psi range depending on the house. If the gauge is on the floor or climbing into the relief-valve range, call. Low pressure usually means a leak, a failing fill valve, or air in the system. High pressure is a safety issue.
My boiler is leaking. Is that an emergency?
Any active leak is worth a same-day look, especially in winter. Common sources are the pressure relief valve, pump seals, zone valves, fittings, and corrosion. A relief valve that drips steadily often means the system is over-pressurized, not that the valve is “just old.”
What is kettling, and why is my boiler banging?
Kettling is a rumble or knock from scale and debris on the heat exchanger — like a kettle boiling dry in spots. Flathead and well-water minerals make this more common. Banging can also be air in the loops, a failing pump, or water hammer. It’s not something to ignore through another heating season.
Some rooms are hot and others are cold. Is that the boiler?
Often it’s a zone valve, thermostat, pump, or air trapped in a loop — not a dead boiler. Radiant floors, older Kalispell houses, and mixed radiator/baseboard systems each fail in different ways. We’ll trace the zone that’s actually down instead of guessing at the boiler.
How often should a boiler be serviced?
Once a year, before heating season. That visit covers combustion, safety controls, pumps, pressure, leaks, and whether the boiler is short-cycling. A Montana winter is a long run-time. Waiting until the first no-heat night in January is how small problems become freeze-ups.
Do you work on all boiler brands?
Yes. We service, repair, and maintain residential boilers of all common brands, and we hold a Montana state boiler license.
Do you offer 24/7 emergency boiler repair?
Yes. Call (406) 260-2952 any hour. Reeve answers, with no after-hours upcharge.