HVAC Contractors Oshawa — Transparent Pricing, Same-Day Service
Oshawa homeowners trust Go Lime for honest, hassle-free heating and cooling service. Whether your furnace needs urgent repair, your air conditioner is due for replacement, or you're ready to upgrade to a high-efficiency heat pump, Go Lime delivers expert HVAC installation and service across Oshawa and Durham Region — with upfront pricing, flexible monthly payment plans, and a 30-day money-back guarantee on every installation.
Why Oshawa Homeowners Choose Go Lime
Durham Region winters are cold and persistent. Summers push well into the 30s with humidity. Your HVAC system works hard in both directions — which is exactly why Oshawa homeowners need a reliable HVAC contractor they can count on year after year, not just when something breaks.
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Proudly Canadian
We're 100% Canadian-owned, supporting local businesses and communities. Choosing Go Lime means investing in Canada.
Complete Transparency
No hidden fees. No vague estimates. We provide upfront pricing before any work begins, so you're never caught off guard on your invoice.
Real Same-Day Service
A furnace breakdown in January or an AC failure in July can't wait a week for an available technician. Go Lime works to get a licensed technician to your Oshawa home the same day you call, including weekends. Call early in the day to maximize same-day availability.
Customer Satisfaction
Join over 18,000 satisfied customers who've rated us highly for our exceptional service and reliability.
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Completely Online
As Canada's first fully online, commission-free home comfort company, Go Lime puts convenience and control directly in your hands: no sales appointments, no awkward kitchen table conversations.
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EnergyStar® Certified Products
All of our systems are energy-efficient and built to perform in Ontario's climate, helping you reduce utility bills while keeping your family comfortable year-round.
HVAC Services in Oshawa, Ontario
Water Heater Installation & Replacement
When your water heater fails, you need fast, affordable replacement — not a week-long wait. Go Lime installs EnergyStar® certified tank water heaters across Oshawa and Durham Region, with same-day replacement available and Go Flex monthly plans starting as low as $24.95/month.
Endless Hot Water on Demand in Oshawa
Upgrade to continuous comfort with our ultra-efficient tankless water heaters starting at just $44.95/month. Designed to save space, reduce energy bills, and deliver hot water on demand, it’s the modern solution for busy Oshawa homes.
Furnace Installation & Repair
Go Lime provides furnace installation, furnace repair, and furnace replacement across all Oshawa neighbourhoods, from Central and McLaughlin in the south to Windfields and Kedron in the north.
We install high-efficiency Lennox gas furnaces sized correctly for your home's square footage, insulation, and layout. Every installation is completed to TSSA standards by a fully licensed technician and backed by our 30-day money-back guarantee.
Rebates Available
Heat Pump Installation
For Oshawa homeowners looking to reduce natural gas costs, lower their carbon footprint, and take advantage of significant government rebates currently available, a heat pump upgrade is one of the smartest HVAC investments you can make.
Air Conditioner Installation & Repair
Whether your existing AC unit is underperforming, breaking down repeatedly, or simply reaching the end of its lifespan, Go Lime can replace it with a properly sized, professionally installed central air conditioning system.
We help Oshawa homeowners select the right air conditioning system for their home's specific cooling load, then complete the installation cleanly and efficiently — so your home is ready before peak summer heat arrives.
Boiler Service & Replacement
Many older Oshawa homes — particularly in established neighbourhoods like O'Neill, McLaughlin, Vanier, and the Lakeview area — rely on hot water boiler systems for radiant heating. Go Lime's licensed technicians are experienced with residential boilers and handle everything from emergency repairs to complete high-efficiency boiler replacements.
Water Filters
Cleaner Water. Healthier Living.
Protect your family with advanced water filtration that removes impurities and improves taste right from the tap. Starting at just $19.95/month, our systems are designed for Oshawa homes to deliver safe, great-tasting water every day.
Getting started with Go Lime is simple
Getting started with Go Lime is simple
1. Choose Your Product
2. Choose How You Pay & Place Your Order
3. Order Confirmation
4. Professional Installation
5. Receive Documentation & Support
Getting started with Go Lime is simple
1. Choose Your Product
2. Choose How You Pay & Place Your Order
3. Order Confirmation
4. Professional Installation
5. Receive Documentation & Support
30-Day Money-Back Guarantee
Not Happy? Full Refund. No Questions.
Full 30 Days
Take a whole month to experience the difference. No rush, no pressure.
100% Refund
Get every penny back. We'll even remove the water heater at no cost.
No Questions
Simple process. If you're not satisfied, just let us know. That's it.
Risk-free promise backed by thousands of happy customers
Peace of Mind. Covered Year-Round.
From water heaters to air conditioners, we’ve got you covered with affordable, worry-free coverage that keeps comfort running smoothly - no surprise costs.
Introducing the Go Protect Plan
Protect your appliances with coverage that ensures peace of mind. Go Protect has got you covered for repairs or replacements, so you can focus on what matters.
Need More Fexibility?
Enjoy comfort on your terms with Go Flex- our flexible payment option that lets you spread out the cost of your equipment and service. No large upfront payments, no surprises just predictable monthly plans that work with your budget.
We Plant Goodness
Every order supports reforestation. For each purchase made, we plant a tree because real change starts with simple actions. Place an order, and we’ll plant a tree on your behalf.
Helpful Guides for Oshawa Homeowners
Not sure if you need a repair or a full replacement? Wondering if a heat pump is right for your home? Our guides cut through the confusion.
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The season changes. You flip on your furnace after months of it sitting idle or your water heater starts acting up on a cold morning. You call an HVAC...
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What Is a Red Tag and What Should You Do If You Get One?
If an HVAC technician has ever left your home or commercial property and told you your system has been "red tagged," you probably felt a mix of confusion and...
Serving Homes Across Oshawa & Surrounding Durham Region Communities
Go Lime provides HVAC installation, repair, and maintenance across all Oshawa neighbourhoods, including:
- Central Oshawa (Downtown)
- McLaughlin
- O'Neill
- Eastdale
- Vanier
- Donevan
- Lakeview
- Pinecrest
- Samac
- Taunton
- Kedron
- Windfields
- Northglen
- Northwood
- Beaton
What Our Customers Say About Us
What Our Customers Say About Us
4.8 ★ out of 5 based on 7,000+ reviews
Jenny Tam
Mehdi did a great job installing my water heater. He was very patient and explained to me what was replaced and he also confirmed that the old heater will be return to my old provider. He is awesome. Higly recommended:)
Baba Gowda
Mehdi from Golime was very helpful and installed all the equipment quickly and guided me how to use and monitor.. great service.
Mahad
Ali and Mehdi were fantastic today. They scheduled the job and came early and worked amazingly to finish and make sure the water heater was working. After three weeks of dealing with Reliance, I'm happy they were able to provide a quick resolution.
Mahad
They scheduled the job and came early and worked amazingly to finish and make sure the water heater was working. After three weeks of dealing with Reliance, I'm happy they were able to provide a quick resolution.
Super Dave
Mehdi and his team from GoLime did an amazing job with my new heat pump installation.
He was fast, clean and organized.
He took extra care in routing the lines and left the place neater than when he showed up.
I’m really excited to have fresh COLD air again in the home.
Thanks Mehdi and the team at GoLime!
Highly Recommended!!!
Stella Keri
I have had a great experience with GoLime when they installed a new water heater tank and chimney liner at my home today. From start to finish, the service was outstanding. Murry and MacKenzie were professional, knowledgeable and efficient and completed the work in a timely manner and with great attention to detail. I really appreciated their clear communication and respectful approach throughout the entire process. Thank you again for a job well done.
Stella
I really appreciated their clear communication and respectful approach throughout the entire process. Thank you again for a job well done.
Cassey Tan
An incredibly simple purchase experience using GoLime.com to replace my water heater. Their installation team was quick, professional and efficient. The sales and dispatch team took the time to listen and address concerns and responded quickly. Thank you GoLime team!
Mina Sidaros
Ervin was very professional and service was fast and on time. I would recommend him for any water heater issues.
Suzanne Johnson
Of course, my air conditioner stopped working just before the heat wave last week. I was under a contract with a big-name company, but I was not pleased with their service. A friend recommended GO lime, and it was the best recommendation. I got a heat pump, tankless water heater, and furnace installed. I contacted them on June 19, and they installed it on June 21. Amir, Hossein, Milad, and Mehrdad spent all day here setting everything up. They explained everything to me and cleaned up when they were done. Go Lime went above and beyond. I needed an electrical outlet for my tankless water heater, and they had an electrician come out at no cost to me! I am not sure how they keep their prices so low and still have such excellent customer service! I highly recommend Go Lime. Do not hesitate, they are a wonderful company.
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Need Quick Answers?
Call us at +1 877-747-8292, and we'll make your home comfort journey effortless.
Call us at +1 877-747-8292.
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