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

What do These AC Error Codes Mean?

24 / 7 Emergency Service Available. Call Us Now: 1.844.894.6832


[BACK]
What do These AC Error Codes Mean?

Posted On: September 7, 2024

What do These AC Error Codes Mean?

If your AC unit is displaying error codes, it's typically signaling an issue with the system that needs attention. The meaning of error codes can vary based on the brand and model of your AC, but here are some common AC error codes and what they usually mean:


1. E1, E2, E3, E4, E5

These codes often indicate sensor problems or communication errors within the system:


  • E1: Communication error between the indoor and outdoor units.
  • E2: Indoor temperature sensor issue.
  • E3: Outdoor temperature sensor problem.
  • E4: Defrost sensor malfunction.
  • E5: Overload protection issue.

2. F0

Usually signals a refrigerant leak or low refrigerant levels.


3. F1

Problem with the evaporator temperature sensor.


4. F2

Issue with the condenser temperature sensor.


5. P1

Voltage fluctuation or abnormal power supply issue.


6. P2

High-temperature protection for the compressor or system is triggered.


7. P4

Indoor temperature sensor problem, similar to the "E2" error.


8. H3

Compressor overload protection error, which could mean the compressor is overheating.


9. L3

This could point to a fan motor issue, particularly in the outdoor unit.


10. DF

Indicates the system is in defrost mode, which is common in heat pump systems during colder weather.


11. CH34

Overheating or high-temperature warning, possibly signaling a serious problem that requires immediate attention.



[BACK]

See What Our Customers Are Saying:

by Private User in Whitby on Twintech Heating and Cooling

Very impressed they arrive to quote even though I had forgotten to call them back to confirm date & time. They showed the day before installation to deliver the unit. Returned the next day as promised at 9am. Project was completed in a professional manner. They even fixed a few things that they noticed were not installed correctly, or to code by previous heating & air contractors we had at our residence before. Would recommend this company to everyone!

by Private User from Bowmanville on Twintech Heating and Cooling

Greg removed old oil furnace and oil tank from basement relocated new Napoleon propane furnace to allow duct work to be rerouted to a much more suitable location. Moved air conditioner to the new furnace. Dave recommended two available grants to assist with cost. They kept to their original quoted price which was substantially lower than a competitors for the same furnace and work. They completed the work as stated when stated and left the area clean and tidy. We are very pleased with the outcome.

by astephenson in Oshawa on Twintech Heating and Cooling

Twintech installed a Goodman furnace and ac init. Very professional install, both units are working well.

by rcnichols electric in Whitby on Twintech Heating and Cooling

We had Grant and Greg Dainty quote to replace our 20 yr old furnace. I have known them for years and have had other jobs done by them ( AC and Pool Htr). The price was very reasonable and the job was completed in one day.

by Rick. F. in Pickering on Twintech Heating and Cooling

TwinTech was the right choice. Our consultation with Dave set the tone. Professional and knowledgeable, we even received a follow-up call within hours of our install completion, wow! TwinTech arrived as scheduled to install our A/C unit. Within minutes of arrival Greg noted and explained a few out of code faults on our furnace installed by another company, problems fixed, thanks TwinTech. Greg, Grant and "Subaru" Pete were meticulous start to finish. Highly recommended!

by Taresh, Pickering on Twintech Heating and Cooling

Twintech replaced our aging +20 yrs old Furnace & AC with the variable high efficiency Napoleon Furnace matched with the Goodman AC. Sales guy ,Dave was great, gave a no pressure estimate, explained about the Government Rebate program which they took care of completely including arranging the home energy audit. On the scheduled day Greg and his team arrived on time, did a great job and completed the same day , extremely professional and courteous, cleaned up everything , tested the system, Greg took his time to explain the setup. Very impressed with the Napoleon Furnace 9600 which did a great job in maintaining a comfortable temperature last winter and now with the hot weather the Goodman AC cooled the house in much less time than the old AC unit could ever. From start to finish Twintech were great and have no hesitation in recommending them 100%.

by Private User Pickering, ON on Twintech Heating and Cooling

The Twintech team did an excellent job installing our new Goodman air conditioner. They were polite and professional. Greg was knowledgeable and clearly experienced. Thank you Twintech for bringing our cooling system up to current regulations. Job well done!

by Y. M. from Pickering on Twintech Heating and Cooling

Dave from TwinTech was very knowledgeable, professional and thorough in the buying process. He helped us to identify the best furnace for our home and our budget. When we needed a new filter a year later and seemed to have a problem finding the right one, I called Dave up and he delivered a filter to me the next day! The cost was on par with other retailers, but it was this unexpected personal service that really was impressive. The furnace? Works like a charm.

by JLH from Pickering on Twintech Heating and Cooling

Imagine, it's 5 minutes after the midnight countdown New Year's eve and the furnace quits. We called TwinTech fully expecting to leave a message and actually spoke with Greg, one of the owners! We had an immediate repair early the next morning & a new furnace within the week. We have entrusted TwinTech with all our home HVAC service needs for over 6 years. That's why this week with an opportunity to purchase a new BBQ, we called them 1st to see about a gas line install. It's chicken on the grill tonight! They are efficient, reliable, honest, hard working, and -- attentive is an understatement.

by Curtis, Ajax on Twintech Heating and Cooling

Wonderful customer service, starting from the job quote (Dave), to the clean install, to the follow-up. Twintech is a small company which installed my Napoleon furnace, A/C, John Wood tank, and ran the line for my gas dryer. The installation was completed as promised in one day. The work area was kept very clean, and they even took care of my old rental tank. The professionalism and wonderful customer service is second to none. They completed all of my rebate paperwork, and now I'm getting $2000 back! You will not be disappointed if you hire this company for your project.

Related Links:
oshawa gas furnace problems, ac service call, pickering hvac prices, local ac services, ajax furnace inspection, ac repair services, whitby furnace replacement, furnace repairs pickering, oshawa hvac furnaces, central ac service, ac unit maintenance, pickering gas furnace problems, ac installation near me, ajax hvac repair, hvac repairs, ac contractors, ac repair and service, whitby furnaces, residential furnace, residential ac repair, pickering hvac furnace, pickering furnace service, pickering furnaces, oshawa furnace inspection, oshawa furnaces, nearby ac repair,


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.

Unique heat pump situation, insight appreciated

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - September 25, 2023

I live in a duplex from 1886. I own it, and live in the second and third levels. The second level has forced air. Since the air was added, it has been renovated, and it leaves the majority of duct work in stupid spots. We also do not have

Read More

Unexpected Perks of a Brand New AC

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - May 18, 2024

Installing a brand new air conditioning (AC) system in your home or office comes with several unexpected perks beyond the obvious benefits of improved cooling and comfort. Here are some of the surprising advantages: 1. Enhanced Energy Efficiency

Read More

Is My AC Unit Supposed to Be This Loud?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - May 15, 2024

The noise level of an AC unit can vary depending on factors such as the make and model of the unit, its age, and the environment it's installed in. However, in general, modern AC units are designed to operate relatively quietly. If your AC uni

Read More

Easy Ways to Lower the Energy Costs of Your AC

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

Lowering the energy costs of your air conditioning (AC) system can be achieved through a combination of simple habits, routine maintenance, and strategic upgrades. Here are some easy and effective ways to reduce your AC energy costs: 1. Regular Ma

Read More