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Flip dip switches 2 & 3 ON.

Wire C & Y2.

Trying to wire this to furnace with 24 volts thermostat

Is any of you have experience installing mars comfort air centralized ac? How can I wired outdoor unit using regular 24 volt thermostat? Attached is the wiring diagram of the unit?

Sounds like the evaporator drain delay after a call for cooling to me. That or you've accidentally set it so low it seems off.

Are you using an Infinity thermostat? It may be stopping the continuous fan in order to control humidity.

Try disabling the dehumidify option and see if the continuous fan operates normally.

And it is a Heat Pump unit

Hi All, trying to troubleshoot a Carrier HVAC system (Model: FE4ANf005). I have always ran the continuous fan during warm days, and i have noticed it will stop running after a few minutes. (Yes, it is set correctly on the thermostat)

Fan blows normally (ECM fan) when A/C is running, but will only run for a few minutes in continuous mode and then will shutoff. No LED code issues nor faults on the motherboard. Filters changed this week and coils are clean (inside and out). Fan moves freely by hand with no noises. Power cycle fixes the problem but only for 5 minutes then it comes back. Havent had an issue like this before.

Welcome thoughts and comments.

Download the TSSA Media Release - Here

QuoteHamilton resident, facing third prosecution, was found guilty of multiple violations after unsafe work created immediate risks for homeowners

Robert Spearing has been found guilty of multiple counts of working on gas appliances while being uncertified and acting as a contractor when not registered.

Spearing was convicted on multiple counts. In two cases, the work was left with such immediate hazards that the local gas utility had to be called to shut off the gas supply to protect the residents.

This is the third prosecution that Robert Spearing has faced for similar reasons. He has not held a valid certification to perform fuels work for households since 1996. Sentencing is scheduled for July 17, 2026.

"Contractors without a valid certification or registration with TSSA are operating illegally," said Owen Kennedy, Director of the Fuel Safety at TSSA. "None of their work, equipment or qualifications are audited or verified by TSSA. Hiring these fuels scammers can lead to serious risks, including carbon monoxide poisoning and other harmful consequences."

Under Ontario law, maintenance of furnaces and fuel-fired appliances must be performed by TSSA-registered contractors. All registered contractors are required to hire TSSA-certified gas technicians who have extensive training and are qualified to perform fuels work safely.

Before hiring a contractor for fuel-related work, members of the public are encouraged to search for and verify registered contractors using TSSA's online Authorized Heating Fuel Contractors Lookup Tool. 

When approached by fraudulent fuels workers, consumers should report them to TSSA. TSSA is committed to investigating these reports and taking legal action when necessary. Reporting illegal workers can help save others from fuels scams.

The previous 2014 & 2019 TSSA fines can be found here - https://www.hvactechgroup.com/hvacforum/index.php?topic=2954.msg9997#msg9997

HVAC Service & Installation Technician

Website: https://econoairhc.com/
Location GTA, Ontario, CANADA

Pay: CA$27.00-CA$46.72 per hour

Job description:

About EconoAir

For over two decades, EconoAir has been a trusted name in Richmond Hill and the GTA for premium home comfort solutions. As an authorized Carrier dealer with a 4.9-star reputation, we pride ourselves on exceptional workmanship, honesty, and 24/7 reliability. We don't just fix HVAC systems; we build lasting relationships with our community.

We are looking for a skilled, customer-focused HVAC Technician to join our growing team. If you take pride in your trade, love solving complex mechanical puzzles, and want a stable, long-term career with a supportive team, we want to hear from you.

What You'll Do (Responsibilities)

Install & Upgrade: Install residential and light commercial heating, cooling, and ventilation systems (furnaces, A/C units, heat pumps, tankless water heaters) according to manufacture specifications and local building codes.
Diagnose & Repair: Troubleshoot, diagnose, and repair complex mechanical and electrical faults in HVAC systems, including boilers, thermostats, and zoning controls.
Preventative Maintenance: Perform routine maintenance and seasonal tune-ups to ensure optimal system efficiency and equipment longevity.
Blueprint Navigation: Read and accurately interpret electrical schematics, technical manuals, and piping diagrams.
Customer Service: Represent EconoAir professionally in the field. Explain technical issues to homeowners in plain English and recommend solutions clearly and transparently.
Safety First: Maintain strict adherence to TSSA regulations, Ontario safety standards, and company safety protocols.
What You Bring (Qualifications & Experience)

Licensed Trade: Valid TSSA Gas Technician license (G2 minimum, G1 preferred) and/or Residential Air Conditioning Systems Mechanic license (313D or 313A).
Proven Experience: 3+ years of hands-on experience in HVAC installation, maintenance, and service (residential or light commercial).
Technical Savvy: Strong mechanical aptitude with deep knowledge of refrigeration cycles, electrical diagnostics, and hydronic/boiler systems.
Clean Record: Valid Ontario G Driver's License with a clean driving record (abstract required).
Soft Skills: Excellent problem-solving skills, punctuality, and a polite, customer-first attitude.
Tools: Own basic hand tools and trade-specific safety gear.
To Apply: Please submit your resume and a brief summary of your HVAC experience to info@econoairhc.com

Only candidates selected for an interview will be contacted.

Experience:
HVAC installation, maintenance, and service: 3 years (required)

Licence/Certification:
TSSA Gas Technician license (G2 minimum, G1 preferred) (required)
313D or 313A (required)
Ontario G Driver's License with a clean driving record (required)

Work Location: GTA, Ontario, CANADA (On the road)

ESA inspectors, along with their technical team have decided to enforce more stringent rules on our low voltage wiring:

To summarize, ALL installs moving forward:

1. Low voltage wiring (AC, HRV, HUM, thermostat etc) is to be supported at the same intervals as high voltage with approved methods like approved cable straps, staples, hangers etc.  Tape is not an approved support.  If using zip ties, they are to be rated for "support" and also UV when used outdoors.

2. Low voltage wiring outdoors must be ran inside liquid tight, including a liquid tight fitting at the condenser.  You cannot run the low voltage inside the same conduit as the high voltage.

Below are the rules/sections being used by ESA and their final decision.  A Notice of Deficiency which contains a "Postponement" requires no repair.  This is a notice telling us that they will start enforcing soon.  If the Notice of Deficiency shows as "Open", repairs will need to be made by you and signed off for us to send back to ESA.

Rule 12-102
Rule 12-3022

It's strange because the scope of Rule 12 clearly says Class 2 circuits are exempt, which is what our 24V low voltage wiring is.

Quote"In all cases, a proper connector is required to maintain the 3R enclosure. Either it will be a liquid tight conduit with connector or approved cable with outdoor rated/ strain relief connector.  Inspectors throughout the region have been advised to issue postponements for old permits and moving forward we will be looking closer at these items."