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I believe that model of HRV requires 4 wires for the interlock.

Quote3.3.2 UNIT INTERCONNECTION WITH CENTRAL FORCED-AIR SYSTEM (R/C/G/GF)
These connections must be done if you want the unit to force the central forced-air system blower operation when ventilating.
NOTE: These connections are required for installation confi guration T-4. Refer to section 2.2 for more details.

You connect the 1st wire between the R terminal on the HRV and the R terminal on the furnace.

You connect the second wire between the C terminal on the HRV and the C terminal on the furnace.

You connect the 3rd wire between the GF terminal on the HRV and the G terminal on the furnace.  Remove the G wire coming from the thermostat, that is already on the furnace G terminal, and marette it to the 4th wire from the HRV G terminal.

Hi all, We just had a Trane S9V2 furnace and Venmar V130H65RT installed.
The HRV controller will make the furnace fan ramp up when choosing min, med, or high but I have to have the furnace fan set to on all the time for this to work.
If I set it to auto, the HRV will kick on but the furnace fan will not.
How should this be wired so the HRV controls the on/off and speed of the furnace?
Right now there are only 2 wires from furnace to HRV
Cheers

It's possible your gas detector meter is detecting trace mercaptan.

Why did Enbridge issue a warning tag on the furnace, if the water heater was the problem?  What Clause did they use?  And who cleared the warning tag on the furnace?

Without a manometer to test the gas piping system, you could perform a dial test at the gas meter.

Make sure no gas appliances will run during this test.  You may want to unplug the water heater.  Any standing pilot appliances would need to be turned off so no gas is being used.  Mark the 0.01m3 (metric gas meter) or 1/2ft2 (imperial gas meter) dial on the gas meter.  The dial on the gas meter should not move past your mark.  A hour long test should be sufficient.
 
If it does, there is a gas leak somewhere.  I would then turn the furnace gas shut off (on the gas piping) to the off position, and repeat the dial test.  If there is no longer a leak then it's likely gas is leaking past the furnace gas valve, out the orifices.

Download the TSSA Media Release - Here

QuoteToronto, ON, May 25, 2026 – Repeat offender Mark Van Watteghem has been sentenced to 15 days in jail and fined $10,000 plus a victim surcharge by the Ontario Court of Justice after being found guilty of fuel safety violations under the Technical Standards and Safety Act.

Mr. Van Watteghem was convicted for the third time after removing a gas furnace and installing a replacement unit at a home in Windsor, Ontario. He was found performing this work without valid authorization by the Technical Standards and Safety Authority (TSSA). The fuel technician was previously convicted in 2016 and 2019 for unsafe fuel work and for performing fuel work as an unregistered contractor, receiving fines totalling $25,000 plus the victim surcharge.

"Mark Van Watteghem's fuel work was deceitful and placed the lives of those who trusted him at serious risk," said Owen Kennedy, Director of Fuels Safety at TSSA. "He has not been a registered contractor for 11 years and has been without a valid certificate for nine years. During that time, his work exposed customers to potentially fatal dangers, including carbon monoxide poisoning. TSSA supports the court's decision to impose a stronger penalty in response to his repeated and fraudulent conduct."

In Ontario, only fuel contractors registered with TSSA and individuals holding a valid gas technician certificate are legally permitted to work on fuel-fired appliances. Before commissioning any fuel work, members of the public are encouraged to search for and verify registered contractors using TSSA's online Authorized Heating Fuel Contractors Lookup Tool.

The previous 2017 Ontario College of Trades fine can be found here - https://www.hvactechgroup.com/hvacforum/index.php?topic=2589.msg8530#msg8530

The previous 2019 TSSA fine can be found here - https://www.hvactechgroup.com/hvacforum/index.php?topic=2950.msg9987#msg9987

Hi All,

I am new to this forum and would really appreciate the expert advice of anyone on here. Being a consumer in Toronto who has a furnace and any other HVAC equipment while looking for simple support or advice is extremely difficult. It often feels like there are so many obstacles in trying to help ourselves without laying out tons of money in order to get any support. Let me explain. I apologize for the length of this message but for full clarity I need to get it down here.
A few weeks back I smelt gas in the furnace room. Had Enbridge come to assess. He shows up, runs a test on the outside gas meter. Sees a pressure issue and then proceeds to check the main two appliances, The Water heater and then the Furnace. Water tank is 15 years old, the furnace is close to 4 years old. Shuts the gas to furnace, does pressure test outside and still an issue. Then shuts the water heater gas supply and tests show no pressure issue. Hence the water heater is the "problem" and he tags it. He also tags the furnace as I left the panel off while I was troubleshooting.  We replaced the water heater as it's a rental but now I needed the furnace to come back online. I don't think there is enough space in this message window to describe how hard this was to get done. Enercare does the yearly maintenance but did not know how to resolve this request. I finally requested a service call for someone to come out, first time the tech cancelled the request after speaking to me but the second tech said she'd come to have look. The assumption was it was a $99 cost to just come out which I had to accept. She was great! Came out, checked the furnace for monoxide etc, and closed it back up and went on her way. Ethically refused to charge me as nothing needed to be done really. Fast forward two weeks and I still smell gas in the room. Took the cover off, bought a neotek hand tester to try empower myself. This is the product I bought.Neotek

The scenarios is like this: I shut power off to the furnace but leave the gas line running. Use the sniffer near each orifice on the manifold and it registers a leak. Each one of the four orifices shows a level, worst being the one closest to the gas valve assembly inside the furnace.  I leave the furnace off for hours yet still sniffs a leak. We have a 10 year parts and labor warranty via Home Depot. Where things get annoying is that even though we are warrantied any licensed HVAC company will charge us around $200 just to come in and assess. I also seem to be stuck with using the original installer. I called them and spoke to the head technician. Unfortunately was a little difficult to understand him but what he was telling me is the Trane S9X2 will have some gas floating in the chamber as normal and I must leave the power on. I hence put the cover back on, set the unit back up as normal and ran a heat cycle. Here is where I am concerned. I sniffed the flu coming out of the furnace, (Its the flu that is short and exits in the furnace room. The other flu goes outside. This sniff test registered high levels of gas even for some time after I turned the heat off again. I left the main fan blower running for a few hours and the sniff test in the flu was registering no gas. Ofcourse thats a silly test as the blower would help disperse the small levels of gas. So I turned the fan off, left the power on and now I test a low level of gas out of the same flu. This has been tested many hours after the blower has been off, Still tested gas and I smell gas if I put nose close the flu. Now that I have explained my scenario. Here are my thoughts. The installer wants $200 just to come out and assess is this reasonable, should I be detecting gas at all? Is this a micro gas valve leak. Is this normal for a Trane S9X2? It seems the system is designed to overcomplicate things by making it expensive to troubleshoot even with a full warranty and there is very little comfort in trying to clarify if this behaviour is normal. So please, anyone who is experienced on this topic please advise. All I am seeing is there should be zero gas sniffed unless the furnace is calling for heat.

If inducer sounds that bad there's  good chance it's not pulling proper draft on high fire,which would explain the limit trip on stage 2.  Also check for partially plugged secondary hx or venting restrictions while you're at it

What is your line voltage?

Hi I have a stelpro sefe2021 and have had to change controllerboard 3 times since 2012 usually nothing works. This time turn thermostat to do a heat or cool call or hrv calls furnace blower turns on for a minute then off for minute then back on. When blower is off loose 5vdc at blower contactor coil and still have 24vac at w and c on controller board. Blower amps normal are nameplate 2.2a. Was doing some tests and noticed when thermostat isn't calling and furnace should be not doing anything one contactor for heat element gets 5vdc to coil for a minute then off for a minute element draws 20a with no blower so shut it down. Is it more than likely board again? Heartbeat led pulses 5vdc and 24vac led constant board is making a high pitch quiet sound

This should happen in Canada too.

https://www.hbsslaw.com/cases/hvac-price-fixing-antitrust-class-action

QuoteHagens Berman has filed a class-action lawsuit on behalf of consumers accusing seven of the nation's leading HVAC manufacturers of conspiring to fix prices of HVAC equipment, including air conditioner condensers, heat pumps, furnaces, air handlers, rooftop units, split systems, chillers and variable refrigerant flow systems. The lawsuit names Bosch, Trane, Carrier, Daikin, Lennox, Rheem and AAON as defendants stating they fraudulently concealed their conspiracy that began in the onset of the COVID-19 pandemic, obscuring their unlawful anticompetitive behavior amid supply chain disruptions. The class action accuses defendants of secret meetings, information sharing and more to drive the price of HVAC equipment to "historic levels."

Major brand names listed in the complaint include:

Bosch (including subsidiaries JC Residential and Light Commercial LLC and Johnson Control-Hitachi Air Conditioning North America LLC)

Trane (including subsidiary Mitsubishi Electric Trane HVAC US)

Carrier (including Viessmann Manufacturing Co.)

Daikin (including ThermalNetics LLC)

Lennox (including subsidiary Allied Air Enterprises LLC)

Rheem (including its division Heat Transfer Products Group LLC) and

AAON (including subsidiary BASX Inc.)

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