Durham Region Air Conditioning Repair, Service and Installation
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
RESULT: Normal operation
FIX: N/A
CODE: OFF
RESULT: Control Failure
FIX: Replace Control Board.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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:
Feb 18, 2025
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.
Feb 18, 2025
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!
Feb 18, 2025
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!
Feb 18, 2025
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!
Feb 18, 2025
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.
Aug 17, 2024
I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. Ive used the company in the past for my furnace so I was happy when I recognized Greg at my front door. Hes great and the service is always top notch. Id highly recommend using twintech for honest, superior service in the Durham region. Thanks!
Aug 13, 2024
I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!
Aug 12, 2024
Just hired TwinTech Heating & Cooling to do an A/C Unit removal & reinstall to allow for landscaping access on the side of my house, and they were wonderful!
Bob, Greg & Mitch make a great team! Quick appointment times, super knowledgeable, expert troubleshooting capabilities & very customer service oriented.
I would highly recommend them for all of your HVAC needs! Great job guys!!
Jul 23, 2024
Twintech Heating & Cooling installed my furnace in 2022 and in fall of 2023 installed my Panasonic Heat Pump. Greg and Mitch did a great job. Helped me through the rebate process. Super happy with the Heat Pump. Only used my furnace 5 times this winter. Energy bills lower, carbon emissions lower.Thank you Twintech. I recommend highly!
Jul 18, 2024
Just had a new furnace installed by Twintech. I cant express how great these guys are at what they do. From the sales to installation they were professional all the way. Very reasonable pricing and courteous during the installation and willing to answer any questions I had. Highly recommended !!!
See What Our Customers Are Saying:
Feb 18, 2025
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.
Feb 18, 2025
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!
Feb 18, 2025
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!
Feb 18, 2025
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!
Feb 18, 2025
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.
Rheem HPWH energy use in off mode?
- SUBMITTED BY:
- TWINTECH HEATING & COOLING
- - September 6, 2023
We recently installed a Rheem ProTerra HPWH, replacing a propane fired water heater. It works fine, but I'm trying to understand an oddity in the EcoNet history reporting. We have the schedule set to heat (on Energy Saver mode) from 4 AM to
Read MoreWhy Your Furnace Leaks
- SUBMITTED BY:
- TWINTECH HEATING & COOLING
- - November 24, 2024
A leaking furnace can be a concerning issue, potentially leading to water damage and system inefficiency. Here's why your furnace might leak and what you can do about it: 1. Condensation Leak Cause: High-efficiency furnaces (with AFUE ra
Read MoreTaking Full Advantage of Your Furnace This Winter
- SUBMITTED BY:
- TWINTECH HEATING & COOLING
- - November 11, 2024
Using your furnace effectively can keep you warm while saving energy and reducing costs. Here are some tips for maximizing your furnace’s efficiency: 1. Schedule a Tune-Up Regular maintenance ensures your furnace runs efficiently. A profe
Read MorePickering Furnace Maintenance
- SUBMITTED BY:
- TWINTECH HEATING & COOLING
- - January 13, 2025
Regular furnace maintenance is essential for homeowners in Pickering, 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 exp
Read More