609 Clarke Rd, London, ON 24/7 Emergency Service
Part of the Jayden's Mechanical family
London, Ontario · Est. 1991

Heating and cooling London families have trusted for thirty years

Poulsen Heating & Air Conditioning has served London from our Clarke Road shop since 1991. The same dependable technicians, now backed by the wider Jayden's Mechanical family for more crew, more brands, and faster peak-season response.

Book a Service Call (519) 455-7330
Licensed & insured 24/7 emergency repair 35+ years in London

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We typically reply within the hour during business hours.

35+Years in London
1991Founded
24/7Emergency service
9Areas served
What We Do

Full heating and cooling, done the London way

From a frozen January furnace to a humid July AC, our licensed technicians handle the full range, with the parts and brands that fail most often stocked on the truck.

Poulsen technician servicing a high-efficiency furnace in a London, Ontario basement
01 · Furnace Repair

Furnace repair that holds up through London winters

When a January cold snap or lake-effect snow pushes your furnace hard, you want the same Clarke Road team London families have called since 1991. We diagnose the real failure, not the symptom, and stock the common igniter, blower, and control-board parts that fail in older London homes so most repairs finish in one visit.

  • Same-day and after-hours winter callouts
  • Honest repair-vs-replace guidance for aging units
  • High-efficiency Carrier, Trane, and KeepRite systems
  • Gas, propane, and oil furnaces serviced
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Air conditioning condenser unit being repaired by a London HVAC technician
02 · AC Repair

Air conditioner repair for humid London summers

Southwestern Ontario summers run hot and sticky, and a central AC that quits in July is more than uncomfortable. Poulsen Heating & Air Conditioning has kept London homes cool for over thirty years, fixing refrigerant leaks, capacitor failures, and frozen coils fast, and now backed by a wider Jayden team for peak-season surges.

  • Refrigerant recharge and leak detection
  • Capacitor, contactor, and compressor diagnostics
  • Ductless and central AC covered
  • Pre-season tune-ups that prevent mid-summer breakdowns
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Ductless mini-split indoor unit mounted on a wall in a London home addition
03 · Ductless AC Installation

Ductless mini-splits for additions, sunrooms, and older homes

Not every London home has ductwork where you need it. Older North London and Wortley Village homes, garage conversions, and rear additions cool and heat beautifully with a ductless mini-split, without the mess of running ducts. We size the indoor and outdoor units to your room and mount them clean.

  • Single-zone and multi-zone systems
  • Heating and cooling in one unit
  • Quiet, efficient inverter technology
  • Clean line-set runs with minimal wall exposure
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Heat pump outdoor unit installed beside a London area home
04 · Heat Pump Repair & Installation

Heat pumps built for Ontario swings

A cold-climate heat pump cuts heating bills and adds summer cooling in one move, and the rebates available in 2026 make the math work for a lot of London homes. Poulsen Heating & Air Conditioning sizes and installs heat pumps that genuinely perform through our winters, and now our Jayden-backed crew handles the peak-season surge.

  • Cold-climate heat pump sizing and load math
  • Ontario rebate and financing guidance
  • Dual-fuel pairing with existing furnaces
  • Annual maintenance to protect efficiency
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Modern direct-vent gas fireplace installed in a London, Ontario living room
05 · Gas Fireplace Installation

Gas fireplaces that warm the room, not just the wall

A direct-vent gas fireplace adds real heat and a focal point to a London living room, and it keeps working when the power goes out. We install and service direct-vent and inserts, run the gas line safely to code, and tune the flame so it heats the space rather than looking pretty and doing nothing.

  • Direct-vent and insert installations
  • Gas line runs to code, permitted
  • Pilot, thermocouple, and valve repairs
  • Annual cleaning and safety inspection
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Smart thermostat installed on a wall controlling a London home HVAC system
06 · Thermostat Repair & Replacement

Smart and programmable thermostat service

A failed thermostat is the most common reason a perfectly good furnace or AC won't start, and the easiest to fix. We replace aging mercury and programmable thermostats with smart models that learn your London home's schedule, and we wire them correctly the first time so the cycle actually works.

  • Nest, Ecobee, and Honeywell installs
  • C-wire and power solutions for older homes
  • Multi-stage and heat-pump compatible
  • Setup so the schedule saves energy
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London Neighbors

Why homeowners keep calling us back

“Called on a Sunday in January with no heat and they had someone at our door within a couple of hours. Honest about what was wrong and didn't push a new furnace we didn't need.”

DK
D. K.London, ON

“We have used Poulsen for three houses over the years. Same dependable service every time, and the team that came out knew our neighborhood and the kind of furnace we had.”

MR
M. R.Byron, ON

“They installed a ductless unit in our sunroom addition and you genuinely cannot see the line set from inside. Clean work and they cleaned up after.”

H
HomeownerKomoka, ON

“Straight talk on a heat pump and the rebate paperwork. No pressure, just the numbers. We went ahead and the heating bill dropped noticeably.”

R
ResidentDorchester, ON

“Our AC quit during that humid stretch in July. Fast response, fair price, and the tech explained what failed so we understood it.”

C
CustomerSt. Thomas, ON

“Reliable and local. We like that they have been on Clarke Road for decades and now we hear they are part of a bigger group, which showed when they had extra crews for the cold snap.”

H
HomeownerLondon, ON
Our new chapter

Part of the Jayden's Mechanical family

In 2026, Poulsen Heating & Air Conditioning joined the Jayden's Mechanical family. For you, that means the same Clarke Road shop, the same licensed technicians, and the same honest service we have delivered since 1991, now backed by a larger Southwestern Ontario group.

What changes for the better: more crew for peak-season and emergency calls, access to more equipment brands and financing, and the depth to handle anything from a single furnace repair to a full home comfort system.

Read our story

What stays the same

  • The same Clarke Road shop and phone number
  • The same licensed, local technicians
  • Honest repair-vs-replace guidance, every time
  • London-rooted, for over thirty years
Where We Work

Proudly serving London and area

LondonSt. ThomasStrathroyDorchesterIldertonKomokaLucanByron
Questions

What London homeowners ask us

Do you offer same-day or emergency furnace repair in London?
Yes. Winter breakdowns can't wait, so we prioritize no-heat and no-AC calls across London and the surrounding area, including after-hours and weekends when the weather demands it. Call (519) 455-7330 and we will tell you the earliest window.
Are you still the same Poulsen company from Clarke Road?
Yes. We have been on Clarke Road since 1991, and we joined the Jayden's Mechanical family in 2026. The same licensed technicians, the same shop, and the same standards, now with a wider crew and more equipment brands behind us.
Do you service areas outside London?
We serve London and the surrounding communities including St. Thomas, Strathroy, Dorchester, Ilderton, Komoka, Lucan, and Byron. If you are unsure whether we cover your address, call us and we will confirm.
Should I repair or replace my furnace?
It depends on the age, the repair cost, and the efficiency of what you have. As a rule, if a furnace is past 15 years and the repair is more than half the cost of a new high-efficiency unit, replacement usually pays back in lower bills. We give you the honest numbers either way.
What brands do you install and service?
We install and service major brands including Carrier, Trane, KeepRite, Lennox, and others. Being part of the Jayden's Mechanical family gives us access to a wider range of equipment and financing options than before.
Do you help with heat pump and rebate paperwork?
Yes. Cold-climate heat pumps qualify for Ontario rebates in 2026, and we handle the sizing, the installation, and the paperwork so the rebate is straightforward for you.

Need heat or cooling today?

Call us now for same-day service across London, or book a call-back and we'll reach out within the hour.

(519) 455-7330 Book online
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