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Reliance Heating, Air Conditioning & Plumbing

HVAC Companies in Oshawa, Ontario
Ranked #9 in Oshawa | Grade B-
4.80 (7,204 reviews)

Reliance Heating, Air Conditioning & Plumbing

Local HVAC and plumbing service provider based at 1155 Boundary Rd Unit 8 in Oshawa, Ontario, supporting heating, cooling, water heaters, and general plumbing needs with 24/7 availability.

Reliance Heating, Air Conditioning & Plumbing business photo 1 - HVAC in Oshawa
Reliance Heating, Air Conditioning & Plumbing business photo 2 - HVAC in Oshawa
Reliance Heating, Air Conditioning & Plumbing business photo 3 - HVAC in Oshawa
Reliance Heating, Air Conditioning & Plumbing business photo 4 - HVAC in Oshawa
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Why Homeowners Choose This Business

Local coverage from an Oshawa, Ontario-based team with round-the-clock availability. Technicians are noted in reviews for explaining work and confirming systems operate correctly before leaving. Booking and arrival updates are available by phone.

Service Area

Serving Oshawa, Ontario and much of Durham Region, including nearby communities such as Whitby, Courtice, and Ajax, depending on schedule and dispatch.

Local Pro Business

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Listing details

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This profile includes more business details, homeowner trust signals, and a fuller public presentation.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

A quick local comparison based on review strength, business detail, and local service fit.
  • Has more review volume than many local competitors.
  • Shows strong customer satisfaction signals based on review quality and volume.

Trust Signals

Emergency Service - Listed as Open 24 hours

Services Covered

  Electrical Services
  Plumbing Services
  Renovation Services
  Furnace Repair
  Air Conditioner Repair
  Maintenance
  Water Heater Replacement
  Boiler Service
  Installations
  Heat Pump Service
  Ductless Mini-Split
  Indoor Air Quality
  Thermostat Installation
  Reverse Osmosis Installation
  Plumbing Repairs
  Drain Troubleshooting
  Hvac Maintenance

Heating and furnace service, air conditioning service, water heater service and replacement, basic plumbing fixture and filtration installs, and system checks.

Reviews

Customer Reviews

Don Forrest
Owen installed our reverse osmosis system today. The install went without a hitch. He brought everything with him the first time and completed the job accurately and neatly. He then thoroughly explained the system and that we will be receiv…
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Owen installed our reverse osmosis system today. The install went without a hitch. He brought everything with him the first time and completed the job accurately and neatly. He then thoroughly explained the system and that we will be receiving filters from Reliance at the appropriate time. He explained the flushing system and we are doing that now. He has a great attitude and we conversed on many subjects while he was here. He left our kitchen the way he found it. I would.let work in my house anytime. Thank you, Owen! Don and Madeleine. 312 Sail Vista Drive, Bobcaygeon, K0M 1A0.
MJL
Our hot water tank rental went for a crap late Sunday evening. Called Reliance and they had a technician here Monday at 12:30pm. Kyle was awesome! He told me how long it would take to remove the old tank out and to have the new one insta…
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Our hot water tank rental went for a crap late Sunday evening. Called Reliance and they had a technician here Monday at 12:30pm. Kyle was awesome! He told me how long it would take to remove the old tank out and to have the new one installed. He made sure everything was in operating order before packing up. He was very informative and answered any questions I had. He was very thorough and made sure everything was removed when completed. Thank you Kyle for being a pleasure to deal with.
Lisa Todman
My service from Kirsan was fantastic! He was so kind and understanding. He saw what the problem was right away and it was a quick fix. He explained everything and showed me the issue. Then once every everything was fixed he did a system che…
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My service from Kirsan was fantastic! He was so kind and understanding. He saw what the problem was right away and it was a quick fix. He explained everything and showed me the issue. Then once every everything was fixed he did a system check to make sure all was working well. I now have peace of mind. Thank you so much again, Kirsan.
Juanita Persaud
I have never experienced such poor service. In the middle of January, our electrical furnace stopped working and we had no heat in the house. We booked a service appointment with Reliance between 7 and 9 am. We waited from 7 am and never r…
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I have never experienced such poor service.

In the middle of January, our electrical furnace stopped working and we had no heat in the house. We booked a service appointment with Reliance between 7 and 9 am. We waited from 7 am and never received a call or any update from the technician. At 8:30 am, I called customer service and was told the technician was on his way and just loading parts into his vehicle. By 9:30 am, he still had not arrived. I called again and was told the same thing.

He never showed up or called.

Later, I received a message saying my appointment had been rescheduled because the technician arrived and we were not home. This was completely false. We had been waiting since 7 am and had called customer service multiple times. No one came to our door.

We then booked a second appointment between 4 and 8 pm. This time the technician did show up, but he was unable to diagnose the problem with our furnace. Despite not identifying the issue or providing a solution, he still expected us to pay the $99 plus tax diagnostic fee.

Paying for a “diagnosis” when no diagnosis was actually provided is unacceptable.

Between the missed appointment, misinformation from the call center, and a technician who could not resolve the issue but still wanted payment, this was extremely frustrating and disappointing.

Be very cautious when booking service with Reliance. Based on our experience, the service is unreliable and not worth the cost. I would not recommend them.
northland james
Water heater was leaking, The tank was replaced with new which is much noisier 24/7, releasing air in a way the old tank never used to. For some reason now whenever a hot water tap is turned on in the house the pipe bangs. The pipe bangs…
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Water heater was leaking,

The tank was replaced with new which is much noisier 24/7, releasing air in a way the old tank never used to.

For some reason now whenever a hot water tap is turned on in the house the pipe bangs.

The pipe bangs extremely loudly while running the washing machine.

And now it leaks differently in a new section of the tank.

The young guys that I dealt with were pleasant though which is the reason for any stars at all.

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Frequently Asked Questions

Public listings show this location as open 24 hours, seven days a week. Availability for on-site service can vary by call volume and location, so calling ahead is recommended. Emergency response times depend on technician scheduling. After-hours service may involve different dispatch procedures.

Customers commonly mention furnace and air conditioning service, water heater replacements, and system checks. Technicians often explain findings and confirm proper operation before leaving. Scope and brand support can vary by technician and parts on hand. Call to confirm your specific equipment and needs.

Reviews reference reverse osmosis installations completed neatly with instructions provided to homeowners. Availability may depend on stock and scheduling. If you have a specific model in mind, ask about compatibility. Technicians typically review maintenance steps after installation.

Response time depends on demand, weather, and technician availability. Some reviewers report next-day or faster service for urgent issues, while others note delays during peak periods. Calling early and confirming an arrival window can help. Ask about updates if timing changes.

Several reviews note that technicians remove old tanks or parts and tidy the workspace before leaving. Cleanup practices can vary by job size and site conditions. If you have special disposal needs, mention them when booking. Technicians typically perform a final check and walk-through.
 Verified Listing

Opening Hours

  • Monday Open 24 hours
  • Tuesday Open 24 hours
  • Wednesday Open 24 hours
  • Thursday Open 24 hours
  • Friday Open 24 hours
  • Saturday Open 24 hours
  • Sunday Open 24 hours

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Business Details

Business Rating
4.80 (7,204 reviews) Pro Listing
Address
1155 Boundary Rd Unit 8, Oshawa, ON L1J 6Z7, Canada, Oshawa, ON L1J 6Z7
Business Type
Service
Website
https://reliancehomecomfort.com/durham/
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