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 Brent L on Twintech Heating and Cooling

Work was done on schedule, professionally, according to quote and with minimal inconvenience to building users. Very happy with the end result. The only area for improvement from my experience - need more timely quoting process.

by Karen on Twintech Heating and Cooling

The team was great! Very knowledgeable, professional and extremely helpful. A few days after install the unit didn’t seem to be working, user error, but within minutes of contacting them..on a Saturday.. a tech was on the phone troubleshooting with us. I highly recommend Twintech for your cooling or heating needs. They stand by their products and a pleasure to deal with.

by Rob on Twintech Heating and Cooling

During the hottest week in the summer our old A/C decided to call it quits. I called Twintech Heating & Cooling after receiving a referral from a family member; came highly rated for being an honest, family-run business, who appreciates their customers. Dave was able to accommodate my hectic schedule and book a late evening appointment to walk through the specifics. Greg and Mitch arrived exactly on time a few days later, were very polite and friendly, and within a couple of hours had a new unit up and running. I also received a follow-up call to ensure we were happy with the Amana.

by Linda Robinson on Twintech Heating and Cooling

They were on time and very professional. I'm so glad I decided to go with Twintech, thanks!

by Famcam1953 on Twintech Heating and Cooling

Timely and appreciated - this was during the hottest days this year when our Air and Furnace way.
Efficient. Professional. No BS or overselling. What was promised, was delivered at a cost-effective price point.
Down to earth.

by DG Sellers on Twintech Heating and Cooling

Professionally done and took care to cover all entry floors to the house for the installers to remove the old furnace and install a new furnace.
I also made recommendations of the tankless water heater that we had installed and items to address. We did not know they also installed tankless water heaters.

by Bill, Pickering on Twintech Heating and Cooling

Price was not the cheapest nor the most expensive of my quotes. It's the quality of the installation that makes for a good AC system. The twins' knowledge & professionalism was evident in the small details:
Very clean work. Greg made sure that the refrigerant level & temperature were correct. They reinstall the insulation & vapor barrier around the wall. The outside electrical cords were secured to the wall. Proud to support this local company. Thank you.

by Taz on Twintech Heating and Cooling

Great team of guys came to do the work. Very professional. Arrived on time worked very efficiently and were very clean. They answered any questions we had without hesitation. The air conditioner works great and is so quiet. I highly recommend them and they don't try to up-sell anything right from the start.

by Jordan on Twintech Heating and Cooling

The service was prompt, professional and very courteous. Competitive price. Would highly recommend this company.

by David on Twintech Heating and Cooling

Excellent workmanship, and quick response. Would recommend Twintech to anyone.