Diamond Home Services — heating, cooling, fireplace and chimney services in Toronto & the GTA

Same-day and emergency appointments

Up-front pricing before any work starts

Licensed, insured, background-checked technicians

Written safety report after every visit

4.9 out of 5689 customer reviews · Google, Facebook & HomeStars combined

Services

Everything that heats, cools and vents your home

We hold gas, HVAC and chimney certifications under one roof, so a single visit can cover the furnace, the fireplace and the flue instead of three separate contractors across three separate weeks.

Heating

Furnace Repair

No heat? We diagnose and fix gas and electric furnaces the same day.

A furnace that quits in January is not a maintenance item, it is an emergency. Our gas-licensed technicians carry the ignition, control and blower parts that account for most Ontario furnace failures, so the majority of no-heat calls are resolved on the first visit.

  • Furnace runs but the air coming out is cold
  • Short cycling: turns on and off every few minutes
  • Blower runs constantly and never shuts off
  • Banging, screeching or rumbling on start-up
Furnace Repair details

Emergency Furnace Repair

24/7 no-heat response with stocked ignition, control and blower parts on every truck.

No heat overnight in an Ontario January is a burst-pipe risk before it is a comfort problem. Our emergency line is answered by dispatch rather than a machine, and no-heat calls go to the front of the board ahead of routine maintenance.

  • No heat at all, overnight or on a weekend
  • Furnace locked out and will not reset
  • Carbon monoxide alarm sounding
  • Smell of gas near the furnace
Emergency Repair details

Furnace Installation & Replacement

Right-sized, correctly vented high-efficiency furnace replacement with a heat-loss calculation.

Most furnaces in Ontario are replaced with whatever size the old one was, which is how homes end up with an oversized unit that short-cycles for twenty years. We run a heat-loss calculation on your actual house before quoting a size.

  • Furnace is 15 to 20 years old and repairs are becoming routine
  • A major component has failed — heat exchanger, control board or inducer
  • Rooms in the house have never heated evenly
  • Heating bills climbing year over year with no change in habits
Furnace Installation details

Boiler Repair & Service

Hot water and radiant boiler diagnosis, service and controls work by gas-licensed technicians.

Hydronic heating is quieter, more even and longer-lived than forced air, but far fewer technicians are genuinely comfortable with it. Our boiler crew works on hot water, radiant and steam systems in older GTA homes every week.

  • Some radiators heat and others stay cold
  • System pressure keeps dropping and needs topping up
  • Banging, knocking or gurgling in the pipes
  • Boiler short cycles on and off rapidly
Boiler Service details

Water Heater Repair & Replacement

Gas and electric tank and tankless diagnosis, repair and replacement — including rental buyouts.

No hot water is usually one of four things: a failed thermocouple or igniter, a burnt element, a tripped thermal switch, or a tank that has simply reached the end of its life. We test rather than guess, and we tell you which of those it is before quoting.

  • No hot water, or hot water that runs out far sooner than it used to
  • Water pooling around the base of the tank
  • Rumbling or popping from the tank during heating
  • Rusty or discoloured hot water
Water Heater details

Cooling & Air Quality

Air Conditioning Repair

Fast, refrigerant-certified AC diagnosis and repair through the Ontario summer.

An air conditioner that runs but does not cool is telling you something specific — and it is usually one of six things. We test airflow, refrigerant charge, capacitor health, condenser condition, the thermostat circuit and the condensate path before recommending any work.

  • Unit runs constantly but the house never reaches the set temperature
  • Warm air from the vents while the outdoor unit is running
  • Ice on the refrigerant lines or the indoor coil
  • Outdoor unit hums but the fan does not spin
AC Repair details

Heat Pump Installation

Cold-climate and hybrid heat pump systems sized and commissioned for Ontario winters.

A heat pump is an air conditioner that also runs backwards, giving you cooling in summer and most of your heating in winter from electricity. In Ontario the question is not whether it works in the cold — modern cold-climate units do — but how it is paired with your existing furnace.

  • You want air conditioning and lower heating costs from one system
  • Existing AC has failed and replacement is already on the table
  • Gas or propane heating costs are climbing
  • You are pursuing available electrification rebates
Heat Pump details

Duct Cleaning

Full negative-pressure air duct cleaning with before-and-after camera footage.

Most duct cleaning is a vacuum held at the register for ninety seconds. Ours is a truck-mounted negative-pressure clean with rotating brush heads driven the full length of every branch, and we show you camera footage of each trunk before and after so you can see what actually came out.

  • Visible dust blowing from registers seconds after the fan starts
  • Rooms furthest from the furnace never reach temperature
  • Dust settles again within a day of cleaning the house
  • Musty or stale smell when the system first kicks on
Duct Cleaning details

Dryer Vent Cleaning & Repair

Lint removal, airflow testing and vent line repair — the highest-risk duct in your home.

Clothes dryers are a leading cause of residential fires in Ontario, and almost every one of those fires starts with lint in the vent line rather than the appliance. If your dryer needs two cycles to dry a load, the vent is telling you it is blocked.

  • Clothes take two cycles to dry
  • Dryer or laundry room is hot to the touch after a load
  • Burning or scorched smell during the cycle
  • Little or no air movement at the outside vent hood
Dryer Vent Cleaning details

Chimney & Fireplace

Chimney Sweep

Full creosote removal and a camera-verified flue inspection, not just a brush and go.

Chimney fires are caused by creosote, and creosote builds up every single season a wood appliance is used. A proper sweep removes it from the full length of the flue, the smoke chamber and the smoke shelf — the areas a quick brush from the top never reaches.

  • Smoke pushing back into the room when you light a fire
  • A strong campfire or tar smell from the fireplace in humid weather
  • Black, flaky or shiny tar-like buildup visible inside the firebox
  • Fires that are hard to start or will not stay lit
Chimney Sweep details

Chimney Repair

Crowns, caps, liners, flashing and repointing — repairs that stop the water getting in.

Almost every chimney problem in Ontario starts with water. Freeze-thaw cycles get into a hairline crack in the crown, expand, and over a few winters turn it into spalled brick, a failed liner and a stain on your ceiling. Fixing the stain without fixing the water path just delays the next repair.

  • Water stains on the ceiling or wall around the chimney chase
  • White chalky efflorescence on the exterior brick
  • Crumbling mortar joints or brick faces flaking off
  • Pieces of clay tile in the firebox
Chimney Repair details

Gas Fireplace Repair

Pilot faults, ignition problems, sooted glass and remote issues — fixed by licensed gas technicians.

Gas fireplaces are simple machines with a few very common failure points: the thermopile, the pilot assembly, the ignition module and the venting. Diagnosing them takes a millivolt meter and a manometer, not guesswork — and in Ontario the work has to be done by a licensed gas technician.

  • Pilot light will not stay lit
  • Fireplace clicks but will not ignite
  • Black soot building up on the inside of the glass
  • Strong gas or chemical smell when running
Gas Fireplace Repair details

Exterior & Outdoor

Gutter & Eavestrough Cleaning

Full eavestrough clear-out, downspout flushing and a flow test before we leave.

A blocked eavestrough does not just overflow, it holds standing water against the fascia and dumps concentrated runoff at the foundation. Most of the wet-basement calls we hear about start at the roofline rather than below grade.

  • Water sheeting over the edge of the eavestrough in rain
  • Plants or saplings growing out of the trough
  • Staining or peeling paint on the fascia below the gutter line
  • Ice damming and large icicles along the roof edge in winter
Gutter Cleaning details

Gutter Repair & Installation

Re-pitching, re-hanging, seamless replacement and gutter guard fitting.

Eavestrough problems are nearly always one of three things: pitch, fasteners or joints. A run that overflows in the same spot every storm is not undersized, it is sagging — and re-hanging it costs a fraction of replacing it.

  • Section sagging or visibly pulling away from the fascia
  • Water dripping from a joint or an inside corner
  • Overflow at the same point in every rainfall
  • Standing water sitting in the trough after the rain stops
Gutter Repair details

Pool Heater Repair

Gas and heat pump pool heaters diagnosed, repaired and pressure-tested.

A short Ontario swimming season means a broken pool heater costs you weeks, not days. Most failures fall into three groups: water flow problems the heater reports as its own fault, ignition and gas train faults, and heat exchanger corrosion from unbalanced water chemistry.

  • Heater fires briefly then shuts down
  • Error code on the control panel
  • Water leaking from the base of the heater
  • Heater runs but the pool temperature never rises
Pool Heater Repair details

By city

Find your service and your city

Each combination below has its own page covering the local housing stock, the failures we see most often there, and current availability.

Not sure which service you need?

Describe the symptom and we'll tell you which trade it falls under — even if it turns out not to be us.

(647) 000-0000
Call Now