$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 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.

by alisiena from Toronto on Twintech Heating and Cooling

Fantastic team. Completed the job as per the specifications and in under 3 hours. Highly recommended Twintech.

by David from Toronto on Twintech Heating and Cooling

During the summer, I previously hired TwinTech to replace my air conditioner when it failed. They did an excellent job so when I decided to proactively replace the furnace I contacted them. The furnace I had was 22 years old and showed signs of internal leakage. It still worked but rather than wait to have it fail in cold weather, I decided to purchase a higher efficiency model before it failed and take advantage of energy efficiency rebates. TwinTech offered very useful advice on the make and model of furnace to choose including high efficiency and variable speed motor. The price was reasonable, TwinTech arrived at the allotted time, installed the new furnace (including some re-routing of exhaust lines since the existing ones were too close to other vents), removed the old furnace, tested the installation and cleaned everything up. Overall, it was a good experience, they did a great job and the new furnace is working well.

See What Our Customers Are Saying:

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!

by Anna Chin on Twintech Heating and Cooling

Amazing experience with TwinTech Heating & Cooling! Their team was professional, knowledgeable, and efficient from start to finish. They installed my new furnace quickly and left everything spotless. The technicians took the time to explain everything and made sure I was comfortable with the system before they left. Great customer service and fair pricing. I highly recommend them for anyone needing HVAC services!

by Connor Agnew on Twintech Heating and Cooling

Great experience all around. Bob was sharp and easy to talk to, and Greg handled the installation perfectly. Would hire them again in a heartbeat.

Is My Furnace Unit Prepared for the Season?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - September 5, 2024

To determine if your furnace is prepared for the season, it's important to go through a checklist that ensures it's functioning properly and efficiently. Here's a quick guide to help you evaluate whether your furnace is ready: 1. Check

Read More

Is My HVAC System Ready For Spring?

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

spring is the perfect time to ensure your HVAC system is in top shape before the warmer weather hits. Here’s a quick checklist to help you figure out if your system is ready: 1. Check and Replace Air Filters Dirty filters restrict airflow

Read More

When to Call a Professional to Inspect Your Heat Pump

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - February 28, 2024

It's generally a good idea to call a professional to inspect your heat pump under several circumstances: Annual Maintenance: It's recommended to have your heat pump inspected and serviced by a professional at least once a year, prefe

Read More

Ajax Furnace Maintenance

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - January 14, 2025

Regular furnace maintenance is essential for homeowners in Ajax, Ontario, to ensure optimal performance, energy efficiency, and longevity of their heating systems. Twintech Heating & Cooling, a family-owned business with over 30 years of experien

Read More