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Usual HVAC Services Challenges We Resolve

From furnaces that will not fire to air conditioners that have stopped cooling, here are the HVAC issues our clients call us about most.

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Furnace Blowing Cold Air

A furnace that runs but delivers cold air usually has a failed igniter, a tripped high-limit switch from restricted airflow, or a gas supply issue preventing combustion. Running the blower without heat accelerates wear on the motor and does nothing to warm the home. We check the ignition sequence, flame sensor, limit controls, and gas valve to restore proper heating.

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Air Conditioner Freezing Over

Ice forming on the evaporator coil or refrigerant lines is almost always caused by restricted airflow from a clogged filter, or a low refrigerant charge forcing the coil below its safe operating temperature. Running a frozen system drives up energy costs and risks permanent compressor damage. We assess airflow, refrigerant pressure, and coil condition before safely restoring operation.

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Heat Pump Not Switching Between Modes

A heat pump that stays stuck in heating or cooling mode typically has a failed reversing valve, a stuck solenoid, or a thermostat signal fault preventing the mode switch. Ignoring a stuck reversing valve risks overheating the compressor in the wrong operating mode. We test the reversing valve mechanically and electrically and replace the component if it cannot be restored.

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Boiler Losing Pressure

A boiler that repeatedly drops below its operating pressure usually has a leak in the hydronic circuit, a faulty pressure relief valve that is venting too early, or a failed expansion tank that can no longer buffer system pressure changes. Left unaddressed, chronic low pressure causes the boiler to lock out and can lead to circulator pump damage. We test the system pressure, locate the leak or fault, and restore correct pressure regulation.

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Thermostat Not Communicating With System

When the thermostat displays correctly but the system does not respond, the issue is usually a wiring fault at the control board, a failed transformer, or a thermostat that has lost its configuration after a power interruption. Continued attempts to force the system on can sometimes trigger a safety lockout that is harder to clear. We test the full control circuit from the thermostat to the board and repair or replace what has failed.

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Loud Banging at Furnace Startup

A single loud bang when a furnace fires is often caused by delayed ignition from a dirty burner, where gas builds up before the igniter catches it. This condition puts stress on the heat exchanger and can crack it over time, creating a carbon monoxide risk. We clean the burner ports, test ignition timing, and inspect the heat exchanger for stress fractures.

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HVAC System Running But Can't Reach Temperature

An HVAC system that runs for hours without reaching the thermostat setpoint often has a dirty heat exchanger or coil blocking heat transfer, a refrigerant charge issue reducing output, or excessive heat loss in the home's envelope overwhelming system capacity. Allowing this to continue increases energy consumption and accelerates compressor and motor wear. We test system output against the rated capacity and identify where the performance gap is occurring.

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Carbon Monoxide Alarm Going Off

A CO alarm responding to a running furnace is a serious condition that should not be dismissed. The most common cause is a cracked heat exchanger allowing combustion gases to enter the circulated air supply. Evacuate the home and call the gas utility before calling for service. We perform a combustion analysis and full heat exchanger inspection before returning any system to service.

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HVAC System Not Serviced in Over a Year

A heating or cooling system that has not been professionally serviced in two or more years is running with unknown wear on capacitors, heat exchangers, refrigerant levels, and blower components. Each of those conditions adds operating stress and raises failure risk. We complete a full-system assessment and restore the equipment to proper operating condition before the next peak season arrives.

Reviews

What Our Customers Say

★★★★★

Thorough, honest, and no pressure

I called Winnipeg Service Pros for a furnace inspection before I listed my home for sale. The technician was thorough, pointed out a few things worth addressing, and gave me honest advice on what to fix versus what to leave. No upselling, no scare tactics. I ended up having the repairs done and felt good about the whole process.

★★★★★

Came the same day, fixed it the same day

Our furnace stopped working on a Thursday morning. Winnipeg Service Pros had a technician at the house by 2 PM, and the repair was done before dinner. He replaced the igniter and checked the rest of the system while he was there. Fast, professional, and the price was fair.

★★★★☆

Great technician, one part took a day to arrive

The technician diagnosed the problem with our boiler quickly and was very professional throughout. One component had to be ordered and arrived the next morning, so we were without heat for part of a day, which was a bit frustrating. The follow-up visit was smooth and everything has worked well since.

★★★★★

AC tune-up made a real difference

Booked Winnipeg Service Pros for an air conditioner tune-up in early September. The technician found the coils were caked with debris and cleaned everything properly. He also checked the refrigerant and capacitor. The system ran noticeably better and quieter after the visit. I plan to book again before next summer.

★★★★★

Finally a company that explains things clearly

I have dealt with HVAC companies that just do the work and hand you a bill. Winnipeg Service Pros was different. The technician explained every step, showed me what he was finding, and gave me options before proceeding. That level of communication made me trust the service completely. I will use them again.

★★★★★

Heat pump service done right

Our heat pump was losing efficiency in both heating and cooling mode. Winnipeg Service Pros sent someone who clearly knew heat pump systems well, not just furnaces. He found a refrigerant issue and a failing reversing valve, explained what each meant, and repaired both in one visit. Excellent knowledge and professional service.

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From gas furnaces and fireplaces to pool heaters and tankless water heaters, our certified technicians keep your home safe, warm, and running right.

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