$49 / month O.A.C Including Install
$49 / month O.A.C Including Install

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Durham Region Air Conditioning Repair, Service and Installation

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Rheem furnaces are all equipped with an advanced 7-segment diagnostic display you can use as a guide if something goes wrong with your heating system. Unlike many other furnaces, Rheem ones don't use flashing LED light sequences to indicate errors, and the display will instead give you a simple code you can use for diagnostics. For instance, 0 means the unit is in standby, while H means the heat is on.


The flashing LEDs on your furnace will correspond to a specific fault code that is shown here on their diagnostic chart.


CODE: Error Code 10.
RESULT: There's a one-hour lockout in place.

CODE: Error Code 11.
RESULT: The ignition failed.

CODE: Error Code 12.
RESULT: Low flame detected.

CODE: Error Code 13.
RESULT: The flame was lost.

CODE: Error Code 14.
RESULT: There was an unexpected flame.

CODE: Error Code 20.
RESULT: There was a twinning fault.

CODE: Error Code 22.
RESULT: Problem with high limit.

CODE: Error Code 26.
RESULT: Reversal of line and neutral.

CODE: Error Code 33.
RESULT: Roll-out switch problem.

CODE: Error Code 55 / 57.
RESULT: Pressure switch issue.

CODE: Error Code 58 / 59.
RESULT: Water or condensation problem.

CODE: Error Code 61.
RESULT: Problem with the blower.

CODE: Error Code 93.
RESULT: Problem with the control.


See What Our Customers Are Saying:

by Peter, Pickering on Twintech Heating and Cooling

On coldest night of the year our furnace quit. At 8:40 in the morning Greg arrived and gave us a diagnosis and a recommendation. By 2:30 we had a new furnace and were warm again. Great company. Great customer service. Good reasonable price.

Peter, Pickering

by New Furnace Installed on Twintech Heating and Cooling

Twin tech team was very efficient and prompt. They provided a quote within hours of request and got the job done on time. No disruption to home function. We would highly recommend this team. Job well done.

by John from Toronto on Twintech Heating and Cooling

Our furnace bit the dust, and Twintech came out to troubleshoot and diagnose the problem within a couple of hours. Mitch was super helpful, patient, and answered all of our questions. When we decided to get the furnace replaced, the crew was over first thing the next morning and did a fantastic job. Not only did they complete the job in a few hours, but they cleaned up and respected our house as they went, and answered all of our follow-up questions. I've used Twintech for our HVAC needs in the past and will continue to do so. I'd recommend them to anyone, and it feels good to support a local, family-owned business.

by Ryan k on Twintech Heating and Cooling

Dave and the Twintech team were fabulous from day 1 and helped us through the process to identifying a new furnace and AC unit. This was our first time through this process and Dave did a thorough job explaining all the components and was very patience answering all our questions. Dave provided great insights and fair pricing.

The Twintech team did an awesome installation. Very clean and efficient. I would highly recommended their service.

by Louise in Scarborough on Twintech Heating and Cooling

We had a new Amana furnace installed by Twintech and we were very pleased with the installation. It is nice to have a warm house again.

by Private User on Twintech Heating and Cooling

Excellent job. Excellent service. Competitive price. Its rare to find a company with the knowledge and professional results we have experienced with Twintech. The clean and neat installation with attention to detail and drop sheers to respect our property is a clear indication of Twintechs high level of integrity. The 1-1/2 gas line upgrade they did for our pool 3 years ago was awesome. Can't say enough. Thank-you Twintech.

by Private User on Twintech Heating and Cooling

Twitch did a great job with the installation of our new furnace. I really appreciated their honesty and I could trust what they were telling me. Another company tried to suggest significantly more work at a greater cost claiming it was necessary to meet current building code. Twintech is very fair. All staff I meet were friendly, polite and trustworthy. I would recommend Twitch for a furnace.

by Private User on Twintech Heating and Cooling

This is a professional team that's easy to deal with. I would strongly recommend them

by hj.taggart in OSHAWA on Twintech Heating and Cooling

Very professional firm from start to finish!
They removed the old oil tank and furnace. They installed air conditioning and a new propane furnace.
Professional installation, on time and no mess.
Very pleased with their work and would highly recommend the company. Our house is three stories so they spent the time to do all the calculations to make sure we would have great performance on each floor.
Thank you again!

by susieschoeppler in Oshawa on Twintech Heating and Cooling

Upon a routine yearly maintenance, it was discovered there was a leak in the heat exchanger and a I needed a new furnace. I know nothing about these things and was completely stressed out. The company I had the maintenance plan with quoted me a huge number to rent a furnace, I just wanted to cry. Then I spoke to Dave at Twintech. He was so knowledgeable and calming, provided me a fair quote and within a few days I had an amazing crew show up to my house and install my new energy efficient furnace! I have already recommended these wonderful people at Twintech to a good friend of mine. Thank you Twintech!!

See What Our Customers Are Saying:

by Aaron on Twintech Heating and Cooling

We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.

by Linda on Twintech Heating and Cooling

Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!

by Robert Rogers on Twintech Heating and Cooling

Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.

by Robert Mizuno on Twintech Heating and Cooling

We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!

by Ruth on Twintech Heating and Cooling

TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!

Trying to decide between Trane-Mitsubishi P-series and Nv-series

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - August 12, 2023

My contractor gave me options between the Mitsubishi Nv-series NTXSKH36 and the P-series TRUZH036, both 3-ton. The P-series is $3000 more expensive but seems to have a slightly better COP at low temperature. It looks like the P series is mostly

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How Does a Heat Pump Operate?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - December 5, 2023

A heat pump is a device that transfers heat from one location to another, typically for the purpose of heating or cooling a space. It operates on the principle of moving thermal energy against the direction of spontaneous heat flow by absorbing heat

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How to Choose a Furnace?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - March 24, 2021

Is your furnace nearing its end of life If you answered yes, then it's time to start looking for a new one before it is too late.When looking into replacing your heating unit, there are a few things to keep in mind when purchasing a furnace. And the

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Panasonic Heat Pumps for Sale in Ajax

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - August 26, 2025

If you're looking to enhance your home's comfort while lowering your energy costs, Panasonic heat pumps offer the perfect solution. At Twintech Heating & Cooling, we provide professional installation and support for Panasonic systems a

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