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

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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 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.

by Trevor Owens on Twintech Heating and Cooling

I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. I’ve used the company in the past for my furnace so I was happy when I recognized Greg at my front door. He’s great and the service is always top notch. I’d highly recommend using twintech for honest, superior service in the Durham region. Thanks!

by Nicole Alain on Twintech Heating and Cooling

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!!

by Courtney Parkes on Twintech Heating and Cooling

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!!

by Jacqueline Graham on Twintech Heating and Cooling

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!

by Bill Grainger on Twintech Heating and Cooling

Just had a new furnace installed by Twintech. I can’t 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:

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.

Expert Heat Pump Services in Pickering

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

If you're looking for expert heat pump service in Pickering, 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

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What is this Weird Noise Coming From My Heat Pump?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - October 20, 2023

A strange noise coming from your heat pump can be a cause for concern, and the source of the noise can vary. Here are some common noises you might hear from a heat pump and their potential causes: Clicking or Tapping: It's normal for a h

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Expert AC Repair Services by Twintech Heating and Cooling

  • SUBMITTED BY:
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  • - July 31, 2024

Expert AC Repair Services by Twintech Heating and Cooling Maintaining a comfortable home environment is essential, especially during the sweltering summer months. When your air conditioner malfunctions, it's not just an inconvenience; it can b

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AC compressor running but fan not spinning

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - April 18, 2023

Hello everyone, It's about AC season where I live and I did a trial run of the AC to check everything is working ok and the compressor is running but not the fan in the AC unit outside. 2 or 3 years ago this happened and giving the fan a pu

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