$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

CLICK HERE FOR A FREE QUOTATION

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


Goodman is one of the biggest names in home heating and energy efficient home comfort.


Goodman Manufacturing is an American company operating as an independent subsidiary of Daikin Group, the world's largest manufacturer of heating, ventilation and air conditioning products and systems. The company, founded in 1975 and based in Houston, Texas, manufactures residential heating and cooling systems.


CODE: Steady on
RESULT: Normal operation
FIX: N/A

CODE: OFF
RESULT: Control Failure
FIX: Replace Control Board.

CODE: 1 Flash
RESULT: System lockout (Retries exceeded)
FIX: After one hour of lockout, your furnace will automatically reset itself.

CODE: 2 Flashes
RESULT: Pressure switch stuck closed
FIX: You should either repair the short or replace the pressure switch.

CODE: 3 Flashes
RESULT: Pressure switch stuck open
FIX: You should check the pressure switch hose for blocks or an improper connection. Otherwise, see if any loose wiring needs tightening.

CODE: 4 Flashes
RESULT: Open high limit
FIX: You should check and clean all the filters, tighten the wiring, and see if there are any blockages in the flue.

CODE: 5 Flashes
RESULT: Flame sense without gas valve
FIX: You should check for a leaky or open gas valve or a lingering burner flame.

CODE: 6 Flashes
RESULT: Open rolloutor open fuse
FIX: Replace Fuse.

CODE: 7 Flashes
RESULT: Low flame signal
FIX: Adjust the gas pressure according to the information available to you.

CODE: 8 Flashes
RESULT: This means your furnace has an igniter circuit problem due to a defective igniter or an improperly connected igniter.
FIX: Replace the igniter or check the ground wiring for defects.

CODE: 9 Flashes
RESULT: This means that your furnace has a high-stage pressure switch that won't close during a high-stage-induced draft blower operation.
FIX: Check your Goodman furnace for a pinched or blocked pressure switch hose.

CODE: Continuous / Rapid Flashes
RESULT: Reversed 115 vac polarity
FIX: You will have to correct the wiring polarity after reviewing the wiring diagram.


See What Our Customers Are Saying:

by Anna Chin, Ajax on Twintech Heating and Cooling

On one of the coldest days of winter, our furnace stopped working. Our regular furnace company came and told us we had a CO2 leak and shut us off. Their quote for a new furnace was way too high and they couldn't even install it on the same day. TwinTech was recommended to us by a friend. We called and spoke to Dave who was very nice and knowledgeable. Grant showed up a short time later and a new furnace was installed the same day with no troubles at all. Best of all, we received a higher-end furnace than what was offered by our previous company and at a cheaper price. I would recommend TwinTech with no hesitation at all.

by Hiba, Pickering on Twintech Heating and Cooling

I installed a new furnace and Air conditioner with them. The installation is of high quality and according to standards. The guys are professional and reasonably priced.. I highly recommend them.

by Robert, Pickering on Twintech Heating and Cooling

Had new furnace installed and ran into some difficulties but the contractor responded in a timely and efficient manner - after further service calls were made, a reasonable resolution was found.

by Brian Burns, Whitby on Twintech Heating and Cooling

The work was done quickly efficiently neatly and professionally. Pleased with the service, information, product, and the company.

by Geoff, Port Perry on Twintech Heating and Cooling

Great sales member named Dave came in told us some amazing items and how they would be priced installed an all. We couldn’t believe it! The next day the ac was installed, that day one employee named Greg told us that our furnace was working way to hard and was causing us to use way too much gas. So two days later they came in an installed a new furnace!

by MB, Ajax on Twintech Heating and Cooling

Installation was done quickly and professionally. The new furnace is quiet and provides even heat.

by Richard from Oshawa on Twintech Heating and Cooling

They removed and discarded old furnace. Installed new furnace. Installed air intake pipe, that had never been installed by builder, no charge. Replaced loose hose on floor with hard pipe and rerouted it to drain, no charge. Almost 33% cheaper then quote from Enercare, which was the company we dealt with and had insurance with for 8 years. No yearly fee for cleaning/insurance, saves 300 a year. Courteous, professional, fast, and friendly. My wife and I have been recommending them to everyone we know and meet, and will continue to do so. Thanks for everything, Twintech!!!

by Darcy from Pickering on Twintech Heating and Cooling

This company was great to deal with. Our furnace went down and they installed a new furnace the next day with a lot of professionalism!

by gillian hooton from Uxbridge on Twintech Heating and Cooling

Finally! An honest company with highly knowledgeable and informative staff. Had a furnace service and found multiply errors in our system from an amateur installer. Very fair price to correct problems and will definitely use again.

by dflynn in Ajax on Twintech Heating and Cooling

Had to replace the heating & a/c unit in a condo apartment dwelling. this company recommended by the property manager and president of the condo building. found their workmanship and attention to details very good and very thorough. were able to resolve small problems and situations and happy to feel the heat in my unit. it's pricey, but happy was done by a very professional service. thank you.

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!

Why Panasonic Heat Pumps Are the Smart Choice

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - September 3, 2025

1. Reliable Comfort in Every Season Panasonic heat pumps are designed to keep you comfortable all year long. By transferring heat instead of generating it, they provide both heating and cooling in one efficient system. Even in the coldest

Read More

How Heat Pumps Deliver Consistent Indoor Heating

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - October 23, 2025

When winter hits, no one wants to deal with uneven heating or cold spots around the house. That’s where modern heat pumps truly shine. At Twintech, we install and sell Amana and Panasonic heat pumps—engineered to deliver consistent,

Read More

Why Are My AC Energy Bills Rising?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - August 22, 2024

Rising AC energy bills can be caused by several factors. Here are some common reasons: 1. Aging Air Conditioner Older AC units tend to lose efficiency over time, requiring more energy to cool your home. 2. Poor Maintenance Lack of regular

Read More

Twintech - Your Heat Pump Experts in Toronto

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - April 16, 2025

When it comes to heat pump solutions in Toronto, Twintech Heating & Cooling stands out as the trusted local expert. We specialize in all things heat pump. Twintech offers professional installation, personalized consultations, and ongoing su

Read More