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Verified Reviews for Boiler Repair pros in Roundup, MT

*The Angi rating for Boiler Repair companies in Roundup, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Repair needs.

*The HomeAdvisor rating for Boiler Repair companies in Roundup, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Repair needs.

Last update on May 31, 2026

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Avatar for American Plumbing, Heating and Excavation, LLC
American Plumbing, Heating and Excavation, LLC
4.1(
25
)

Serving Roundup, MT and surrounding areas

In business since 2015

Free estimates

Warranties offered

"They replaced a conventional hot water heater with an on-demand heater and did a superb job. Great service to an area outside of Billings."
Garage heater
Response time12 hrs
Recommended by100%of homeowners
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Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,688
)

Serving Roundup, MT and surrounding areas

In business since 1971

Credit card accepted

"AHS is ok. They cover repairs of most everything under the roof of your house. The companies that contract with them are not always the best. You call AHS with the issue, they send a fax to the repair company and give you the contact info. If they don't contact you within 24 hours, you call them. Sometimes they answer, sometimes they don't. When they arrive (usually three days or so later), they service the item. if it has issues within the 90 days, you call AHS again, they are sent out with no charge. If the serviceman decides the unit is unrepairable, AHS will allow you to choose a replacement from their listing (usually not as good as what you have) they will install and remove your old item, or give you wholesale amount to buy and install your own. Prices vary on what you want covered and what you want the copay to be, plus where you live. For me it is 49.99 per month with a 75.00 time of service order. You can have more than one item serviced at the same time under the same fee. If you have a SEAR product the repair guys are great. Not that wild about the other ones they send out. But it is a big savings compared to calling someone on your own. The cost of service is only the 75.00 copay."
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+2

Recommended by65%of homeowners
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Avatar for Mayes Mechanical, LLC
Mayes Mechanical, LLC
3.6(
7
)

Serving Roundup, MT and surrounding areas

In business since 2015

Free estimates

Emergency services offered

Mayes Mechanical, LLC is your premier choice for all of your HVAC needs in Billings and surrounding areas. We are a locally owned and operated full service company that has 20 years of experience in all aspects of HVAC and Mechanical field. No project is too big or too small, so call today and let us put our experience to work for you!

Greatroom
CK 5500 sq ft home
CK 5500 sq ft home
Response time1 day
Response rate98%
Recommended by71%of homeowners
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Avatar for Transform Home Improvements (formerly Sears)
Transform Home Improvements (formerly Sears)
2.4(
570
)

Serving Roundup, MT and surrounding areas

In business since 1992

Free estimates

Credit card accepted

"Adam, Sears service trechnician, was on time and completed the repair in 1 day...if you're in Sacramanto area looking for HVAC repairman, ask for Adam ONLY..."
Central AC Install
HVAC
HVAC
Best of HomeAdvisor
Recommended by54%of homeowners
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Avatar for Mountain Electric of Montana
Mountain Electric of Montana
5.0(
1
)

Serving Roundup, MT and surrounding areas

In business since 2007

Free estimates

Emergency services offered

We pride our company on reliability, great communication,\nintegrity, and quality work. We are experts in our trade and will do our best\nto keep you as educated as we can on your particular task or project. We look\nforward to earning your business!

Response time10 hrs
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Boiler Repair questions, answered by experts

Once you know where your bleed valves are and how to use them, bleeding out heaters is a quick process. Expect it to take around 10 to 20 minutes, possibly longer if you have a lot of heaters or are still learning how they work. If you have a central bleed valve on your boiler, the process still takes the same amount of time. Make sure you have any keys necessary to turn the bleed valves on. Without bleed valves, the process should take around three hours.

If you hear your radiator clanking even when it’s turned off, it’s typically because there’s trapped water or air in the system, causing a pressure buildup. When you hear significant clanking, popping, crackling, or banging in a radiator that’s turned off, you’ll want to bleed the pipes or call in an HVAC specialist to deal with the problem (and prevent it from happening in the future).

Hydronic and standard electric baseboard heaters differ in how they operate, their cost, and their performance. Standard convection heaters use electric coils to heat the air directly, while hydronic heaters warm a contained liquid like water or oil, which then radiates heat into the room.

In terms of cost and efficiency, hydronic heaters usually have a higher upfront price but are more energy-efficient and cheaper to run over time. This is because the heated liquid retains warmth, allowing the heater to continue providing heat for a while after the thermostat turns it off. In contrast, electric heaters provide heat more quickly but are less efficient.

Ultimately, the better choice depends on your priorities. If you need a room to heat up fast and have a lower initial budget, an electric heater might be suitable. If long-term energy savings are more important and you don't mind a slower heat-up time, a hydronic heater is likely the better option.

Repair costs range from $200 to $800, depending on the issue and required parts.

When it comes to bleeding a radiator, the goal is to let out trapped air rather than letting out the water. Naturally, some water will dribble out when you open the valve to let out the air. But you don’t want a lot of water to leak out. Just leave the valve open long enough that the hissing noise stops, meaning the air has escaped, and just a dribble of water comes out of the radiator.

The Roundup, MT homeowners’ guide to boiler repairs

From average costs to expert advice, get all the answers you need to get your job done.

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