Hot-water and steam heat

Boiler Repair in Pueblo, CO

Pueblo has a lot of old houses — the city counts about one in five housing units built before 1950 — and some still heat with a boiler and radiators or baseboard.

Call (719) 670-8043 Hot water or steam?

24/7 · Licensed & insured · Pueblo & Pueblo West

Cast-iron radiator under a wood-trimmed window in an older home

Price before any work starts
Furnaces, heat pumps, boilers & AC
Every ZIP from 81001 to 81012

When yours acts up, call us 24/7.

Hot water or steam? Look at the boiler

The two systems fail in different ways, so it helps to know which you have before you call.

Hot-water (hydronic)

Has a pressure gauge (often combined with a temperature gauge). Heats radiators or baseboard with circulating hot water. The normal pressure range is on the boiler’s label — Weil-McLain cites about 12 psi as a typical cold fill for a home system.

Steam

Has a gauge glass — a small sight tube showing the water level, which moves up and down while the boiler runs. A low-water cutoff shuts the boiler down if the water gets too low, and manufacturers say to test it during the heating season.

Common boiler problems

Call usNo heat anywhere

Same first checks as a furnace — thermostat, power switch, breaker — then it’s ignition, controls, the circulator pump, or on a steam boiler, low water tripping the cutoff.

Try firstSome radiators cold, or cold at the top

Usually trapped air in a hot-water system. Bleeding the radiator often fixes it. Dark, dirty water when you bleed it means sludge in the system — call us.

Call usPressure too high, or the relief valve drips

The relief valve opens when pressure climbs too high — commonly an expansion tank or fill problem. Never cap a relief valve.

Call usPressure keeps dropping

Water is getting out somewhere. A leak in the boiler, the piping or a radiator valve needs finding before it causes damage.

Call usBanging, kettling or gurgling

Noises like these are a service call, not something to live with.

Boilers in Pueblo’s older houses

The City of Pueblo puts the average home at more than 55 years old — substantially older than housing across Colorado — and its housing plan counted nearly 21% of units built before 1950. Pueblo’s oldest neighborhoods go back much further: Bessemer, the steel-mill town that grew up beside the CF&I works, was laid out in 1880 and joined the City of Pueblo in 1894. Some of those older houses still heat with a hot-water boiler and radiators or baseboard.

Older systems bring older parts: original radiators and valves, circulator pumps, expansion tanks and controls that may have been replaced piecemeal over decades. Our technicians work through the whole system, not just the boiler cabinet.

When the boiler fails in a cold snap

Hydronic pipes and radiators can freeze if a boiler stays off long enough in Pueblo’s coldest weather. While you wait for us, keep the house as warm as you safely can, let a faucet trickle (Pueblo Water notes moving water doesn’t freeze), and know where your main water shutoff is. Never heat the house with a gas oven.

Questions we hear

What pressure should my boiler be at?

Go by the range on your boiler’s label or manual. As a reference, Weil-McLain gives about 12 psi as a typical cold fill for a home hot-water system, and Slant/Fin’s guidance runs about 12–15 psi when cool and 15–25 psi when hot. Pressure that keeps climbing, or keeps dropping, is a reason to call us.

The relief valve on my boiler is dripping. Is that bad?

It’s telling you something. The relief valve opens when system pressure gets too high — often an expansion tank or fill-valve problem. Don’t cap or plug it. Call us so we can find out why the pressure is high.

How do I bleed a radiator?

Radiators that are cold at the top usually have trapped air. Each one has a small bleed valve near the top; opening it lets air out until water appears. Afterward, check the boiler’s pressure gauge. If the water that comes out is dark or sludgy, or the same radiators need bleeding again and again, call us — that points to a bigger problem.

Does Pueblo’s altitude affect gas boilers too?

Yes. Like furnaces, gas boilers have high-altitude requirements in their manuals, and some models need high-altitude kits above certain elevations (for example, Weil-McLain sells kits for some boilers above 5,500 feet). The setup has to match your boiler’s manual for your elevation — about 4,700 feet in Pueblo and around 5,000 in Pueblo West.

Boiler trouble? Call us.

We answer 24/7 for Pueblo and Pueblo West. Our licensed & insured technicians repair hot-water and steam boilers and tell you the price before any work starts.

Call (719) 670-8043

Where the Pueblo facts on this page come from

Checked against these public sources on November 3, 2026. Weather figures are National Weather Service records for Pueblo Memorial Airport.