$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

If you're looking for help fixing your coleman furnace, look no further! Our comprehensive coleman furnace repair guide will explain common issues, provide troubleshooting tips, and show you how to read your model's error codes.


CODE: Slow green flashing.
RESULT: Coleman furnace is operating normally.
FIX: N/A.

CODE: Slow amber flashing.
RESULT: Normal operation with a call for heat.
FIX: N/A.

CODE: Steady on red.
RESULT: There's a control failure.
FIX: Check Control Unit.

CODE: Rapid red flashing.
RESULT: There's a twinning error with incorrect 24V phasing.
FIX: Check the twinning wiring.

CODE: Rapid amber flashing.
RESULT: There's a low flame sense current.
FIX: Check and clean the flame sensor. If it's still an issue, check for proper gas flow.

CODE: One red flash.
RESULT: A flame's present with the gas turned off.
FIX: Check the gas valve. It could be leaky or slow closing.

CODE: Two red flashes.
RESULT: Pressure switch is stuck in the closed position.
FIX: Check if there is a faulty pressure switch or miswiring.

CODE: Three red flashes.
RESULT: Pressure switch is stuck in the open position.
FIX: Check if there is a faulty inducer, a blocked vent pipe, a broken pressure switch hose, or a faulty pressure switch.

CODE: Four red flashes.
RESULT: Limit switch is stuck while open.
FIX: Check for a a dirty filter, an improperly sized duct system, an incorrect blower speed setting, or a faulty blower motor.

CODE: Five red flashes.
RESULT: Rollout switch is stuck while open.
FIX: The rollout control is manually reset. Therefore, if it has opened, then check to see if the inducer is operating properly or there is an issue with the primary heat exchanger.

CODE: Six red flashes.
RESULT: Pressure switch cycle has locked out.
FIX: The furnace will lockout for one hour and then reset.

CODE: Seven red flashes.
RESULT: There's an ignition lockout due to too many retries.
FIX: The flame couldn't be established, check for a faulty gas valve, a dirty or defective flame sensor, a faulty hot surface ignitor, or a problem with the burner.

CODE: Eight red flashes.
RESULT: There's an ignition lockout due to repeated power recycles.
FIX: Check if there is low gas pressure, a dirty or defective flame sensor, or a faulty gas valve.

CODE: Nine red flashes.
RESULT: There's a grounding or line polarity issue.
FIX: Check the polarity at both the furnace and branch.

CODE: Ten red flashes.
RESULT: Gas continues to flow with no call for heating.
FIX: Check on the gas valve and the gas valve wiring.


See What Our Customers Are Saying:

by Bill, Whitby on Twintech Heating and Cooling

Reasonable price and the workmanship was prompt and timely and the employees were great to deal with.

by Nadia, Toronto on Twintech Heating and Cooling

The sales process was friendly, informative, and very consultative. They worked hard to earn our business by taking a careful look around our home to assess our needs, providing a lot of information about the product, and answering all our questions and finding the right solution for our home at a competitive price. They prepared us very well for what to expect on installation day, and the installation went very smoothly - no surprises, all very professional! They gave us a call after installation to ensure we were happy with the work. We're very happy that we chose to work with TwinTech to get our new furnace.

by Private User on Twintech Heating and Cooling

Twintech promptly responded to request for quotation. They were thorough and helpful in explaining options. The quote was very competitive. Installation of new furnace was very professionally completed. Excellent work.

by Rita, Scarborough on Twintech Heating and Cooling

When our old oil furnace finally broke down we decided it was time to finally convert to natural gas and finally install central air conditioning at the same time. Knowing it was going to be a significant investment for us, we wanted to make the right choice. Twintech came highly recommended by a friend and we were not disappointed. From the first contact with the salesperson, until the final touches on the installation, we were so pleased with their service. Everyone from the company was so friendly, efficient and a pleasure to deal with. Best of all, the cost was very competitive. We would certainly recommend Twintech to anyone requiring HVAC work in their home.

by Bob S, Pickering on Twintech Heating and Cooling

Mitch from Twintech came out for our annual furnace inspection. We found him to be friendly, conscientious & he left the work area clean. We were also very impressed with the thoroughness of the job he did. This is the 2nd job we’ve had Twintech do for us & have been very happy with the results for each. We highly recommend this company. Thank you, Mitch, Dave & Greg.

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.

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!

Choosing the Perfect AC Unit

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - May 30, 2024

Choosing the perfect air conditioning (AC) unit involves considering several factors to ensure you select a system that efficiently cools your space, is cost-effective, and meets your specific needs. Here are key considerations to help you make th

Read More

Optimizing Furnace Efficiency For Winter

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - October 20, 2024

As winter approaches, ensuring your furnace is running efficiently is essential for both comfort and cost savings. A well-maintained furnace not only keeps your home warm but also reduces energy consumption. Here are some tips to optimize furnace eff

Read More

Furnace Thermostat Issues

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - October 24, 2024

Furnace thermostat issues can lead to inefficient heating and discomfort, especially as temperatures drop. If your furnace isn’t functioning properly, the thermostat could be a common culprit. Here are some common thermostat-related problems an

Read More

Is my AC Unit Oversized?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - March 26, 2024

Determining whether your air conditioning (AC) unit is oversized requires some evaluation of your specific situation. Here are some signs that might indicate your AC is oversized: Short Cycling: If your AC frequently turns on and off in shor

Read More