Cooling & Heating Service

Whether it's a overheating engine on a summer highway or a heater that can't keep up with an Ontario winter, your vehicle's cooling and heating systems are critical to both your comfort and your engine's survival. At Northstar Automotive Group in Gormley, ON, Master Mechanic Dawood Motala and his team of certified technicians provide complete cooling and heating services for every make and model — from coolant flushes and radiator repairs to full A/C system diagnostics and evaporator replacements. Cooling system failures rarely announce themselves until it's too late, which is why we take a diagnostic-first approach that identifies small leaks, weak hoses, and failing components before they leave you stranded on the side of the road. Stay cool in the summer, warm in the winter, and confident year-round with a cooling and heating system that's been properly inspected and serviced by people who know what they're looking at.

Coolant Concentration Testing

We test your coolant's freeze and boil-over protection levels to ensure your cooling system is properly mixed for Ontario's extreme temperature range — because coolant that's too diluted can freeze in winter or boil over in summer.

Radiator Hose Replacement (Upper and Lower)

We inspect and replace upper and lower radiator hoses that have become soft, cracked, or swollen with age, preventing the sudden coolant loss and overheating that comes when a worn hose lets go on the road.

Overflow/Expansion Tank Replacement

We replace cracked or leaking coolant overflow and expansion tanks that cause gradual coolant loss, air pockets in the cooling system, and the erratic temperature fluctuations that follow when your system can't maintain proper pressure.

Coolant Temperature Sensor Replacement

We replace faulty coolant temperature sensors that cause inaccurate gauge readings, poor fuel economy, and check engine lights by feeding your engine control module incorrect temperature data it relies on to manage fuel and ignition timing.

Blend Door Actuator Replacement

We replace failed blend door actuators that leave you stuck with air that's always too hot, always too cold, or won't direct properly through your vents — a common and frustrating climate control fault that's often misdiagnosed.

Heater Control Valve Replacement

We replace faulty heater control valves that restrict or completely cut off hot coolant flow to your heater core, restoring the cabin heat your vehicle is supposed to produce even on the coldest Ontario mornings.

Intercooler Service (Turbocharged Vehicles)

We inspect, clean, and service intercoolers on turbocharged vehicles to ensure maximum charge air cooling efficiency — because a compromised intercooler robs your turbo engine of the power and reliability it was built to deliver.

Cooling System Pressure Test

We pressure test your entire cooling system to pinpoint leaks that are too small to see but large enough to cause overheating, identifying exactly where coolant is escaping before it becomes an engine-damaging problem.

Electric Cooling Fan Module Replacement

We diagnose and replace faulty electric cooling fan modules that cause your engine to run hot at idle and in traffic, restoring the active cooling your engine depends on when there isn't enough airflow from driving speed alone.

Refrigerant Leak Detection

We use UV dye and electronic leak detection equipment to locate refrigerant leaks anywhere in your A/C system — because recharging a leaking system without finding the source is just a temporary fix that costs you twice.

A/C Evaporator Replacement

We replace leaking or failed A/C evaporators — one of the most labour-intensive A/C repairs on any vehicle — with the precision and care required to ensure your system cools properly and doesn't develop new leaks after reassembly.

A/C Expansion Valve Replacement

We replace faulty A/C expansion valves that cause inconsistent cooling, icing, or compressor damage by disrupting the precise refrigerant flow regulation your air conditioning system depends on to function efficiently.

A/C Drier/Accumulator Replacement

We replace the A/C drier or accumulator that absorbs moisture and contaminants from your refrigerant — a component that should be replaced any time the A/C system is opened to prevent moisture damage to your compressor and other components.

Rear A/C System Service

We service rear A/C systems on minivans, SUVs, and larger vehicles, ensuring the passengers in the back seat get the same cooling performance as those in the front — because half a working A/C system isn't good enough on a long family road trip.

A/C Vent & Duct Repair

We repair broken, disconnected, or blocked A/C vents and ducts that cause uneven airflow, hot spots in the cabin, or air that never seems to reach where it's supposed to go — restoring proper climate distribution throughout your entire interior.