Low pressure
Leaks, relief valves, fill valves, or expansion tank issues can cause pressure loss.
Expert boiler diagnostics, repair, and annual servicing. We fix leaks, pressure issues, pilot light problems, and more. fast local service available.
Mississauga-based HVAC service with clear communication before work begins.
No hidden fees or surprises. You approve the price before we start any work.
Call (437) 999-4242 any time. We answer outside business hours.
If something needs review after the visit, contact OLU HVAC and the team will explain the next step.
Fill out the form and we'll get back to you within 24 hours. Or call us directly for immediate help.
No obligation. We'll call you within 24 hours.
Service Details
Boiler repair can involve pressure, pumps, ignition, zone valves, expansion tanks, leaks, controls, or air in the system. The right diagnosis depends on the whole hydronic loop.
Leaks, relief valves, fill valves, or expansion tank issues can cause pressure loss.
Ignition, pump, thermostat, zone valve, or control problems can stop heat delivery.
Air, scale, pump issues, or flow problems can create banging, gurgling, or kettling sounds.
A leak may be at a fitting, valve, pump, relief valve, or boiler section.
Inspection Focus
Process
We start with the symptoms, equipment type, location, access notes, and how urgent the issue is.
The technician checks the parts of the system that can actually cause the problem before quoting work.
You get a practical repair, maintenance, or replacement recommendation before approved work begins.
Real answers to questions Mississauga and GTA customers ask us most.
Common causes are a leak, a failed expansion tank, or a faulty pressure relief valve. We diagnose the actual cause before recommending a fix.
Often caused by trapped air or kettling from scale build-up. We bleed the system, descale where needed, and check the heat exchanger.
Yes. We diagnose common hydronic heating and boiler issues. Share the model number when you call so we can prepare for the visit.
If outside temperatures are above freezing, briefly yes. In winter, leave it on to prevent pipes freezing and call us for emergency service.
Olu HVAC Mississauga is open 24 hours. Call us, email us, or send a message.