Boiler Repair and Installation Services in Calgary: Expert Solutions for Residential and Commercial Needs
Boiler Repair in Calgary — Same-Day Service, Every Brand
Your boiler is down. Your house is cold. You need a technician who knows boilers — not a generalist who has to Google the manual. DHL Mechanical dispatches boiler-only specialists with parts on the truck for same-day repair across Calgary.
- After-hours calls go to a licensed tech
- Most repairs completed in one visit
- Flat-rate quote before work begins
- All brands — residential & commercial
Common Boiler Problems We Fix Every Day in Calgary
Recognize any of these symptoms? Here's what's likely happening, what you can check yourself, and when to call.
The #1 winter call in Calgary. Usually caused by a frozen condensate line, ignition failure, or low system pressure. Check first: look at the exterior exhaust vent for ice buildup. If you see ice, carefully pour warm (not boiling) water over it. If the lockout persists, note the error code and call us.
Typical repair: $180–$400Limescale buildup inside the heat exchanger — extremely common with Calgary's hard water (11–15 grains/gallon). The scale restricts water flow, causing localized boiling. Requires professional descaling and ideally a magnetic dirt filter to prevent recurrence.
Typical repair: $250–$450Pressure gauge reading below 12 PSI. Could indicate a slow leak, failed expansion vessel, or stuck pressure relief valve. Check first: use the filling loop to re-pressurize to 15 PSI. If pressure drops again within 24 hours, there's a leak — call for service.
Typical repair: $180–$350On system boilers, typically a failed diverter valve or zone valve. On combi boilers, a failed flow sensor or blocked plate heat exchanger. Not a DIY fix — requires professional diagnosis to identify the correct component.
Typical repair: $250–$500Air trapped in the system (bleed the radiators), a stuck zone valve, or a failing circulator pump. If bleeding doesn't resolve it and the issue affects specific zones, the valve or pump serving that zone likely needs replacement.
Typical repair: $200–$450Could be a failed pump seal, corroded pipe connection, or a pressure relief valve discharging due to overpressurization. If you see water dripping from the boiler, call immediately — leaks near electrical components or gas connections require urgent attention.
Typical repair: $200–$600Not sure what's wrong? Call (403) 863-8246 and describe the symptoms — we'll diagnose it.
How DHL Mechanical Boiler Repair Works
Every boiler repair starts with a diagnostic visit. Our technician inspects the system, identifies the issue, and provides a flat-rate quote for your approval before any work begins. If you proceed, the diagnostic fee is applied toward the repair cost. No surprises, no hourly billing.
- Same-day dispatch — calls received before early afternoon get same-day service
- Flat-rate pricing — you approve the price first, no hourly surprises
- Parts on every truck — IBC, NTI, Viessmann, Navien, and more in stock
- One-visit resolution — most repairs completed without a return trip
- Honest assessments — if a repair isn't worth it, we'll tell you and explain why
Common Repair Pricing
| Repair Type | Typical Range |
|---|---|
| Diagnostic visit | From $180 (applied to repair) |
| Ignition module / flame sensor | $250–$400 |
| Circulator pump replacement | $350–$550 |
| Zone valve replacement | $250–$400 |
| Control board replacement | $350–$600 |
| Expansion vessel replacement | $250–$400 |
| Heat exchanger descaling | $250–$450 |
| Pressure relief valve | $200–$350 |
All prices include parts, labour, and applicable taxes. Exact pricing confirmed after on-site diagnosis.
Why Calgary Homeowners Call Us First for Boiler Repair
Most HVAC companies list boiler repair as one of 20+ services. Their technicians see a boiler once a week — maybe. At DHL Mechanical, boilers are the only thing we do, and we've been doing it since 1996. That means:
- Faster diagnostics — our techs recognize common failure patterns by brand and model
- First-visit fix rate — common parts in stock means fewer return trips
- Accurate quotes — we know the repair before we open the panel because we've seen it hundreds of times
- No upselling — we don't sell furnaces, air conditioners, or duct cleaning, so there's nothing to push
- Direct access — after-hours calls go to a licensed technician, not a call centre
Repair vs. Replace — Our Honest Framework
We never recommend replacement when a repair will do. Here's our framework:
- Repair if the boiler is under 15 years old and the issue is isolated (pump, valve, board, sensor)
- Consider replacing if the boiler is 20+ years old and repair costs exceed 30–40% of a new system
- Replace if the heat exchanger is cracked or parts are discontinued
Need a second opinion on a replacement quote from another company? We're happy to assess. Call us.
Boiler Brands We Repair in Calgary
From Your Call to a Working Boiler
Here's exactly what happens when you call DHL Mechanical for a boiler repair.
Call Us
Describe the symptoms — error codes, noises, what you've already checked. We dispatch a boiler specialist, often same-day.
On-Site Diagnosis
Our technician inspects the system, identifies the fault, and gives you a flat-rate quote. You approve the price before any wrench turns.
Repair
With common parts already on the truck, most repairs are completed in a single visit. No return trips, no waiting for parts to ship.
Test & Verify
We run a full system test, verify operation, and walk you through what happened and how to avoid it in the future.
Boiler Repair Questions
The most common questions Calgary homeowners ask when their boiler breaks down.
Most residential boiler repairs cost $180–$600, depending on the issue and parts required. A diagnostic visit starts at $180, which is applied toward the repair if you proceed. Common repairs like a failed ignition module, circulator pump, or zone valve typically fall in the $300–$600 range including parts and labour. DHL Mechanical provides a flat-rate quote before any work begins.
In most cases, yes. DHL Mechanical offers same-day dispatch for calls received before early afternoon. We carry common parts for IBC, NTI, Viessmann, Navien, and other major brands on every truck, so most repairs are completed in a single visit. For after-hours emergencies, your call goes directly to a licensed technician.
First, check for obvious issues: verify the thermostat is set to heat, check the pressure gauge (should read 12–20 PSI), and look at the exterior exhaust vent for ice buildup — frozen condensate is the #1 cause of boiler lockouts in Calgary winters. If none of these resolve it, note the error code and call us. Having the code ready helps us diagnose faster and bring the right parts.
Yes. DHL Mechanical repairs all residential and commercial boiler makes and models, including IBC, NTI, Viessmann, Navien, Buderus, LAARS, Lochinvar, Weil-McLain, Super Hot, Rinnai, Noritz, and Triangle Tube. We also service older cast-iron boilers and discontinued models where parts are still available.
Repair is usually right if the boiler is under 15 years old and the issue is isolated — a pump, valve, control board, or ignition component. Consider replacement when the boiler is 20+ years old, repair costs exceed 30–40% of a new system, the heat exchanger is cracked, or parts are discontinued. DHL Mechanical provides honest assessments and never pushes replacement when repair is the smarter investment.
Flat-rate pricing means you receive a fixed price for the repair before any work begins — regardless of how long the job takes. No hourly surprises. If the repair takes longer than expected, the price stays the same. You approve the quote, and that is exactly what you pay.
Banging or rumbling (kettling) is typically caused by limescale buildup in the heat exchanger — extremely common in Calgary due to hard water. It is not immediately dangerous, but it does indicate the heat exchanger is under stress. Left untreated, it can lead to heat exchanger failure, a much more expensive repair. A professional descaling and magnetic dirt filter installation will resolve it.