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

24 / 7 Emergency Service Available. Call Us Now: 1.844.894.6832

Durham Region Air Conditioning Repair, Service and Installation

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CODE: O P.
RESULT: Normal operation.

CODE: E 0.
RESULT: Lockout due to excessive retries.

CODE: E 1.
RESULT: Low-stage pressure switch stuck closed at start of heating cycle.

CODE: E 2.
RESULT: Low-stage pressure switch stuck open.

CODE: E 3.
RESULT: Open high-limit switch.

CODE: E 4.
RESULT: Flame detected when no flame should be present.

CODE: E 5.
RESULT: Open fuse.

CODE: E 6.
RESULT: Low flame signal.

CODE: E 7.
RESULT: Igniter fault or improper grounding.

CODE: E 8.
RESULT: High-stage pressure switch stuck closed at start of heating cycle.

CODE: E 9.
RESULT: High-stage pressure switch stuck open.

CODE: E A.
RESULT: Reversed 115 VAC polarity.

CODE: d 0.
RESULT: Data not yet on network.

CODE: d 4.
RESULT: Invalid memory card data.

CODE: b 0.
RESULT: Blower motor not running.

CODE: b 1.
RESULT: Blower communication error.

CODE: b 2.
RESULT: Blower HP mismatch.

CODE: b 3.
RESULT: Blower motor operating in power, temperature or speed limit.

CODE: b 4.
RESULT: Blower motor current trip or lost rotor.

CODE: b 5.
RESULT: Blower motor locked rotor.

CODE: b 6.
RESULT: Over/under voltage trip or over temperature trip.

CODE: b 7.
RESULT: Incomplete parameters sent to motor.

CODE: b 9.
RESULT: Low indoor airflow.

CODE: C 1.
RESULT: Low-stage cooling.

CODE: C 2.
RESULT: High-stage cooling.

CODE: L O.
RESULT: Low-stage heat.

CODE: H I.
RESULT: High-stage heat.

CODE: F.
RESULT: Continuous fan.

CODE: 1 2.
RESULT: CFM/100; Alternates with C1, C2, LO, HI, F.


See What Our Customers Are Saying:

by Private User from Private User on Twintech Heating and Cooling

I have used Twintech many times over the years. They always arrive quickly and get the issue fixed. The most recent incident was when my air conditioner broke last week I called Greg at 11:30am and he was at my home by 2:30pm he had the unit fixed by 3:30pm. Twintech are very reliable and honest and they are experts in the field. I have already recommended them to many of my friends. I would not use anyone but them for my heating and air conditioning issues.

by Kate A in Pickering on Twintech Heating and Cooling

I would highly recommend these guys, professional, fast and competitive pricing. I moved into this place with no working AC unit with a 8 month baby, he was able to come with in a week to fix even in the busy summer days. He really values his customers , I am already recommending to my neighbors.

by Private User in Whitby on Twintech Heating and Cooling

Very impressed they arrive to quote even though I had forgotten to call them back to confirm date & time. They showed the day before installation to deliver the unit. Returned the next day as promised at 9am. Project was completed in a professional manner. They even fixed a few things that they noticed were not installed correctly, or to code by previous heating & air contractors we had at our residence before. Would recommend this company to everyone!

by Private User from Bowmanville on Twintech Heating and Cooling

Greg removed old oil furnace and oil tank from basement relocated new Napoleon propane furnace to allow duct work to be rerouted to a much more suitable location. Moved air conditioner to the new furnace. Dave recommended two available grants to assist with cost. They kept to their original quoted price which was substantially lower than a competitors for the same furnace and work. They completed the work as stated when stated and left the area clean and tidy. We are very pleased with the outcome.

by astephenson in Oshawa on Twintech Heating and Cooling

Twintech installed a Goodman furnace and ac init. Very professional install, both units are working well.

by rcnichols electric in Whitby on Twintech Heating and Cooling

We had Grant and Greg Dainty quote to replace our 20 yr old furnace. I have known them for years and have had other jobs done by them ( AC and Pool Htr). The price was very reasonable and the job was completed in one day.

by Rick. F. in Pickering on Twintech Heating and Cooling

TwinTech was the right choice. Our consultation with Dave set the tone. Professional and knowledgeable, we even received a follow-up call within hours of our install completion, wow! TwinTech arrived as scheduled to install our A/C unit. Within minutes of arrival Greg noted and explained a few out of code faults on our furnace installed by another company, problems fixed, thanks TwinTech. Greg, Grant and "Subaru" Pete were meticulous start to finish. Highly recommended!

by Taresh, Pickering on Twintech Heating and Cooling

Twintech replaced our aging +20 yrs old Furnace & AC with the variable high efficiency Napoleon Furnace matched with the Goodman AC. Sales guy ,Dave was great, gave a no pressure estimate, explained about the Government Rebate program which they took care of completely including arranging the home energy audit. On the scheduled day Greg and his team arrived on time, did a great job and completed the same day , extremely professional and courteous, cleaned up everything , tested the system, Greg took his time to explain the setup. Very impressed with the Napoleon Furnace 9600 which did a great job in maintaining a comfortable temperature last winter and now with the hot weather the Goodman AC cooled the house in much less time than the old AC unit could ever. From start to finish Twintech were great and have no hesitation in recommending them 100%.

by Private User Pickering, ON on Twintech Heating and Cooling

The Twintech team did an excellent job installing our new Goodman air conditioner. They were polite and professional. Greg was knowledgeable and clearly experienced. Thank you Twintech for bringing our cooling system up to current regulations. Job well done!

by Y. M. from Pickering on Twintech Heating and Cooling

Dave from TwinTech was very knowledgeable, professional and thorough in the buying process. He helped us to identify the best furnace for our home and our budget. When we needed a new filter a year later and seemed to have a problem finding the right one, I called Dave up and he delivered a filter to me the next day! The cost was on par with other retailers, but it was this unexpected personal service that really was impressive. The furnace? Works like a charm.

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!

Is My Furnace Unit Dangerous?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - September 14, 2024

A furnace unit can be dangerous if it's not properly maintained or if it's malfunctioning. Here are some key signs and potential dangers to be aware of: 1. Carbon Monoxide Leaks Signs: Yellow or flickering burner flame instead of a s

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My AC is Having a Power Malfunction

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - May 9, 2024

If your AC unit is experiencing a power malfunction, here are some steps you can take to troubleshoot the issue: Check Power Source: Ensure that the AC unit is receiving power. Check the circuit breaker or fuse box to see if a breaker has tr

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Amana Heat Pumps Are a Smart Investment

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - September 4, 2025

Amana heat pumps are built to deliver dependable heating and cooling in one system. With advanced engineering, these units are designed to provide consistent comfort, even during extreme Canadian winters. Homeowners can rely on steady heat in t

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Expert Heat Pump Services in Oshawa

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - April 30, 2025

If you're looking for expert heat pump service in Oshawa, look no further than Twintech Heating & Cooling. With years of experience and a reputation for professionalism, we offer top-tier heat pump sales, installation, and consultation ser

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