armstrong furnace troubleshooting

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armstrong furnace troubleshooting
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Armstrong furnaces are tough and can get you through the coldest winters. But if you don’t take care of it properly, you may find yourself with higher than normal utility bills and lots of HVAC bills. Luckily there are some things you can do to increase the life and strength of your furnace.


The easiest and most important is to change the filter about every month. This will keep airflow strong through your HVAC system, prevent other parts of the furnace from getting clogged and it will keep the air in your home free of allergens and dust. To change the filter on your Armstrong furnace, first locate the filter access panel and slide it open or remove it. Then look inside and locate the filter. Remove the old filter by sliding it out of the positioning rails. Then align the new filter with the arrows and slide it in, similar to how you removed the old one. Then close and access panel and you’re done!


If you’re running into other problems with your furnace, there are a few other easy things to look for: making sure the furnace is plugged in and there are no blown fuses or circuits on your circuit breaker, and making sure the thermostat is set properly. If you’re still having trouble, Armstrong has supplied a list of error codes:


Single LED flash - Flame is burning when gas is off


Two/three LED flashes - Problem with the pressure switch


Four LED flashes - Problem with the height limit switch


Five LED flashes - Problem with the rollout switch


Six LED flashes - Problem with the pressure switch


Seven LED flashes - Problem with the ignitor


Eight LED flashes - The flame is low/dropping


Nine LED flashes - Problem with the voltage


armstrong furnace troubleshooting


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by Private User on Twintech Heating and Cooling

We had a great experience. The guys who installed our a/c did a nice job. Cleaned up.

by Private User on Twintech Heating and Cooling

excellent crew, fast and efficient! Would call them again when I need a new furnace.

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Professional, courteous and efficient, don’t need to say more than that! Use them you will not regret it.

by Private User on Twintech Heating and Cooling

TwinTech was a pleasure to deal with from the estimate through installation. We replaced a 28 year old a/c unit with one recommended by TwinTech's sales representative Dave who took the time to go over the product with us and answer any questions. The warranty is for 10 years parts and labour and they will complete the registration for you. Installation was by Greg (owner) and Mitch and Spencer who were quick and efficient and left everything clean and tidy.

by Private User on Twintech Heating and Cooling

Very professional, from the sales consultation and inspection to the final installation. Met every expectations we had for the job. A local business with great client support. We highly recommend. Twintech is a blue chip! Thanks!

by Private User on Twintech Heating and Cooling

I left a live chat message on their website that my air conditioning was not working. Within 1hr a representative called me to discuss my options.
The next day he came to the house to review my needs and give me a price for a new system. Price quoted was less than I expected and the installation was completed the following day. I found their salesman and the installers very knowledgeable and easy to deal with. All my questions were answered. Everything was properly explained in regards to what unit was needed and why, along with instruction where needed for use.
The installers made sure everything was working properly before they left.

by Samta Chanana on Twintech Heating and Cooling

This is to thank Twintech Heating and Cooling for their exceptional and timely service. Mitch, their technician was very courteous and generous with his time right from his first meeting with us. He not only took the time to check everything but also educated us on why we needed what he recommended. Greg and Mitch graciously accommodated us on our requested day and time for job to be done. They were both very courteous and responsive to our needs and special requests especially in a tight spot. The job was finished neatly and on time. Thank you Twintech for your great service !

by Private User on Twintech Heating and Cooling

They came the day and time they had planned for us and were very fast and efficient! The AC works amazing and it is amazing during the heat of the summer we have already got! Thanks for everything you did for us!

by Private User on Twintech Heating and Cooling

Would recommend this company to friends and family in a heartbeat. Very professional , on time and left no mess when the job was done.

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Great customer service. Responsive and professional. I would highly recommend Twintech, I used them previously for repair service and a new air conditioner- very satisfied.

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armstrong furnace troubleshooting