Durham Region Air Conditioning Repair, Service and Installation
If you're looking for help fixing your Heil Air Conditioner, look no further! Our comprehensive Heil Air Conditioner repair guide will explain common issues, provide troubleshooting tips, and show you how to read your model's error codes..
R-410A Split System Heat Pump.
CODE: Green "POWER".
RESULT: Module has power.
FIX: Supply voltage is present at module terminals.
RESULT: Module has power.
FIX: Supply voltage is present at module terminals.
CODE: Red "TRIP".
RESULT: Thermostat demand signal. Y1 is present, but the compressor is not running.
FIX:
RESULT: Thermostat demand signal. Y1 is present, but the compressor is not running.
FIX:
- Compressor protector is open.
- Outdoor unit power disconnect is open.
- Compressor circuit breaker or fuse(s) is open.
- Broken wire or connector is not making contact.
- Low pressure switch open if present in system.
- Compressor contactor has failed open.
CODE: Yellow "ALERT" - Flash Code 1.
RESULT: Long Run Time - Compressor is running extremely long run cycles.
FIX:
RESULT: Long Run Time - Compressor is running extremely long run cycles.
FIX:
- Low refrigerant charge.
- Evaporator blower is not running.
- Evaporator coil is frozen.
- Faulty metering device.
- Condenser coil is dirty.
- Liquid line restriction (filter drier blocked if present in system).
- Thermostat is malfunctioning.
CODE: Yellow "ALERT" - Flash Code 2.
RESULT: System Pressure Trip - Discharge or suction pressure out of limits or compressor overloaded.
FIX:
RESULT: System Pressure Trip - Discharge or suction pressure out of limits or compressor overloaded.
FIX:
- High head pressure.
- Condenser coil poor air circulation (dirty, blocked, damaged).
- Condenser fan is not running.
- Return air duct has substantial leakage.
- If low pressure switch present in system, check Flash Code 1 information.
CODE: Yellow "ALERT" - Flash Code 3.
RESULT: Short Cycling - Compressor is running only briefly.
FIX:
RESULT: Short Cycling - Compressor is running only briefly.
FIX:
- Thermostat demand signal is intermittent.
- Time delay relay or control board defective.
- If high pressure switch present go to Flash Code 2 information.
- If low pressure switch present go to Flash Code 1 information.
CODE: Yellow "ALERT" - Flash Code 4.
RESULT: Locked Rotor.
FIX:
RESULT: Locked Rotor.
FIX:
- Run capacitor has failed.
- Low line voltage (contact utility if voltage at disconnect is low).
- Excessive liquid refrigerant in compressor.
- Compressor bearings are seized.
CODE: Yellow "ALERT" - Flash Code 5.
RESULT: Open Circuit.
FIX:
RESULT: Open Circuit.
FIX:
- Outdoor unit power disconnect is open.
- Compressor circuit breaker or fuse(s) is open.
- Compressor contactor has failed open.
- High pressure switch is open and requires manual reset.
- Open circuit in compressor supply wiring or connections.
- Unusually long compressor protector reset time due to extreme ambient temperature.
- Compressor windings are damaged.
CODE: Yellow "ALERT" - Flash Code 6.
RESULT: Open Start Circuit. Current only in run circuit.
FIX:
RESULT: Open Start Circuit. Current only in run circuit.
FIX:
- Run capacitor has failed.
- Open circuit in compressor start wiring or connections.
- Compressor start winding is damaged.
CODE: Yellow "ALERT" - Flash Code 7.
RESULT: Open Run Circuit - Current only in start circuit.
FIX:
RESULT: Open Run Circuit - Current only in start circuit.
FIX:
- Open circuit in compressor run wiring or connections.
- Compressor run winding is damaged.
CODE: Yellow "ALERT" - Flash Code 8.
RESULT: Welded Contactor - Compressor always runs.
FIX:
RESULT: Welded Contactor - Compressor always runs.
FIX:
- Compressor contactor has failed closed.
- Thermostat demand signal not connected to module.
CODE: Yellow "ALERT" - Flash Code 9.
RESULT: Low Voltage - Control circuit < 17VAC.
FIX:
RESULT: Low Voltage - Control circuit < 17VAC.
FIX:
- Control circuit transformer is overloaded.
- Low line voltage (contact utility if voltage at disconnect is low).
See What Our Customers Are Saying:
Aug 16, 2022
Very pleased with the installation of our new furnace and A/C unit. From quotation stage to the completion of the job Twintech was very professional.
Thank you for a job well done.
Aug 15, 2022
My old water heater quit on me. I called TwinTech. In less than 4 days, I had my new water heater installed and the old one taken away. The whole process was quick, easy, pleasant, and well done. This is the third time I've dealt with TwinTech and I've been satisfied each time.
Aug 14, 2022
I had them replace my furnace last year. When it came time for the air conditioner this year, I did not hesitate to call Twintech again. I will also have them perform regular maintenance on them.
Aug 13, 2022
We required a new HVAC replacement after running the old
system for 18 years.
Dave understood our requirements and gave us a quote that
covered all the necessary items.
Installation was fast and very tidy. Everything works as
it should. Our thanks to Greg, Mitch and others for their
excellent work. Recommend this family owned business to
anyone else, considering HVAC or other work.
Aug 12, 2022
I needed a new furnace and A/C to replace my 21 yr. old units, and went to the internet to view potential companies in May, I received 3 quotes,
and chose Twintech based on their salesman Dave who was very detailed and covered off everything on what Twintech was all about,
an extremely dedicated company with so many years of experience, and after reading the on line reviews I was sold on Twintech, who did not disappoint as the installation team were top notch with Greg leading,
I would highly recommend this company without any doubts, in my books they are first class all the way. Our new Amana furnace and A/C are working perfectly !
Aug 11, 2022
Flawless transaction. They did exactly what they promised, showed-up on time, cleaned-up, and were highly professional. Highly recommended.
Aug 10, 2022
Salesperson and 2 man installation team were all professional and
knew their stuff. All three were friendly and helpful, answering all
my questions. The quality of their work demonstrated their experience
and expertise in their field.
Aug 9, 2022
A dear late cousin of mine recommended this company and I have been happy with the service.
Aug 8, 2022
We are very pleased with the work done by Twintech. They were very professional from start to finish. Dave came to our home and gave us a very competitive quote for new high efficiency furnace and air conditioner. The installers were very courteous and professional. We would highly recommend them.
Aug 7, 2022
Great experience getting an old furnace replaced.
Sales Guy (Dave) was great - honest, responsive, and friendly.
The work itself was done quickly and we are very happy with the outcome, thank you! We recommend TwinTech!
See What Our Customers Are Saying:
Aug 8, 2025
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.
Aug 8, 2025
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!
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!
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