No-Heat Triage & Code Helper (Furnace)
Fast checks for heat calls, door switch, filter, venting, and limit/pressure errors—with a plain-English code decoder.
Right-Size Furnace Estimator
Use local Hamilton design conditions to estimate your right-size furnace range before you book a visit.
Furnace Filter Size & MERV Picker
Find your correct filter size, choose the right MERV for Ontario homes, and set a replacement reminder.
Furnace Reset & Lockout Decoder
Safe reset steps for common lockouts plus LED flash/code meanings for typical boards (Goodman/Carrier/Lennox).
Why Choose Greg’s
We’re a local HVAC team focused on quick heat restores and straight pricing. You’ll know what’s happening, why it failed, and the exact range before we start—backed by hundreds of reviews.
Hamilton Heating & Cooling
For all your heating and cooling needs, trust our expert team. We specialize in the installation of water heaters, boilers, gas pipes, and furnaces, as well as repairs for heating and cooling systems. Count on us for reliable service and top-quality products.
Furnace Installation
Choose from our range of high-efficiency furnaces at competitive prices. Our expert installation team will quickly install a new furnace in your home or facility.
BOILER INSTALLATION
Our boiler installation services ensure minimal disruption. We offer a selection of high-efficiency boilers from top manufacturers.
Furnace Installation
Choose from our range of high-efficiency furnaces at competitive prices. Our expert installation team will quickly install a new furnace in your home or facility.
BOILER INSTALLATION
Our boiler installation services ensure minimal disruption. We offer a selection of high-efficiency boilers from top manufacturers.
Furnace repair
No heat, strange smells, or a furnace that keeps shutting off? Our licensed gas fitters diagnose and repair most furnace brands the same day across Hamilton and surrounding areas.
Gas Pipe Installation
Count on us for expert gas pipe installation. Our licensed technicians handle all your plumbing, heating, and cooling needs with precision and efficiency.
Furnace repair
No heat, strange smells, or a furnace that keeps shutting off? Our licensed gas fitters diagnose and repair most furnace brands the same day across Hamilton and surrounding areas.
Gas Pipe Installation
Count on us for expert gas pipe installation. Our licensed technicians handle all your plumbing, heating, and cooling needs with precision and efficiency.