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Just make sure you're comparing like for like. Insulated metal duct trunk with insulated hard pipe is a lot more labor than a duct board distribution box and a spider web of flex .

A variable speed increases the rpm to get the requested CFM with higher static. A constant torque does not. The performance curve of a constant torque is very similar to a psc motor, it just uses a...

When a home inspector sees something odd and it's out of their expertise they tell you to get it checked by a pro who specializes in that field.
As to what's wrong and how much to fix it there's no...

Could be the fan bent when trying to get it off a 30 year old motor. Hopefully they checked the rest of the furnace out very well and you don't need to put a bunch of money into what's the...

We go in blocks and narrow it down to point of failure, following the sequence of operation with our meters. If a thermostat never dropped the 24v call for heat then we would move on to the board...

Your 25 year old Lennox didn't have an ECM motor. The new ones will ramp to a lot faster speed to get the required CFM. Have your installer check the duct static pressure and make any neeeded duct...

The rules of this site forbid DIY assistance.

Low pressure safety added so if tank gets too low or regulator fails then heat exchanger doesn't get sooted up? Sure it's a furnace problem and not a propane supply issue?

Just has to be high enough for the coil to be removed .

A heat pump is just like an AC except it has a valve to change where the hot gas from the compressor is sent. In cooling mode it discharges the heat outside. In heating mode the valve shifts the hot...

Greg ask your installing company to call the area Lennox rep. Your system is not performing as designed and if the dealer doesn't know the solution, or even how to measure BTU output, then they need...

At least you tried. Don't take it personally. If I buy a $50K truck and the fuel pump goes out a month out of warranty the dealer doesn't give me any kind of break either,been there.

Your heat pump is seriously under performing. At 45 outdoor air and 1200 CFM blower set up it should be right around 30 degrees difference between supply and return.

Keep what you have and let the new owners put in what they want.

If a gas valve click wakes you up I don't think you'll be happy with anything. Perhaps a 90% furnace with combustion air intake ,and an electric water heater, so you can sound proof the furnace room.

Turn the lock out off and let it run then.

You sure the heat pump will run 100% of the time at 32-34 degrees? If it can maintain the house when it's 20 out then it's going to cycle in freezing rain. IMO you're better off setting the lock out...

I've seen quite a few heat pumps shake, to the point of breaking copper, from iced fan blades. My old house the balance point lock out was set to 35. Below that the gas heat took over.

You sure the water heater is venting? Moisture is a byproduct of burning fossil fuels but it should go outside via the flue. I'm assuming the water heater is in the same room as the furnace,where it...

Usually I'll see inducers run 80-90% of FLA. You can run it until it dies if you want. Primary down side is you'll have no heat while it's broke and sometimes they take a few days to get shipped in.

Flex tape

240 degrees? No way

I'd have them do the gas over and read the directions on the condensate trap.

Heat exchanger is under warranty. You'll have to pay 3 hours labor tops to change it. Whole lot cheaper than a new furnace.

Can't you get one more year out of it?

Tell them to add low ambient controls to your units if you need/want to run them when it's cool out.

Refrigerant turns into an odorless gas as it leaks so no you won't see a mess or smell it. Since the sniffer didn't pick up a leak and they're assuming it's in the wall an isolation test would be a...

A tech isn't going to go by a customer diagnoses anyway. They'll listen to the symptoms and any input you have but do their own diagnostics. Probably 99% of the customers say my thermostat is broken...

This isn't a DIY site and the rules forbid giving you the information requested. When you go to a DIY site information such as make model and serial numbers will help guys look up the parts you need.

There's no way to tell without being on site and checking. Could be either or both. Did your electrician cut out the damaged section or just tape over it? Did he use a meter and measure current and...

Sounds very possible all the items need attention on a 20 year old furnace. The inducer is the only somewhat expensive item on the list. You can wait until the inducer fails if you can live without...

A blower motor doesn't use that much power. Something else is wrong.

It's just information. An error will show E followed by numbers.

Are they clearing the error code from the board memory? Wondering if it's truly an error or just a past issue still in the memory. We sell a bunch of those furnaces and have replaced a bunch of...

If there was more than a few ounces of refrigerant the pressure would not have dropped. He should have got the sniffer out and found where it was leaking.

Rodent perhaps.

Make sure to call the local Lennox dealer to pressure test the heat exchanger. They still run even leaking and you sure don't want that.

Green oil is either dye or it's full of moisture and acid. Did it stink?

The 1/2" PVC goes almost to the bottom inside the bigger PVC. It's a trap to keep exhaust fumes from leak out.

Have your tech put some dye in it.

A 40 degree rise at 50 ambient would indicate not enough air flow inside. Zoned system by any chance?

Everybody was named in that class action. Lennox lawyers made the call that it was cheaper for the company to settle, extend the warranty and pay for labor, than fight it in court. The test are...

The comfort is a communicating thermostat. It talks to the system via information imbedded in a DC voltage. Blower CFM,flame sense, work load % and error codes are sent between thermostat and...

Call your local Lennox dealer for a price. I only know of one place that sells Lennox parts to the general public and they charge about the same as the dealer i work for.

Against the site rules to give part numbers. I can tell you the 12w72 is not the correct coil for that air handler.

Have your duct installed first then the furnace. Don't know if there any psc motor furnaces left in inventory,they stopped making them to comply with DOE standards that went into effect 6/1/2019

Liquid line and true suction. Liquid line stays liquid line in both modes.

Still check superheat and subcool to look at refrigerant flow. Check charge by measuring air flow then calculate BTU output. Every AHRI match gives BTU at 47 degrees and 17 degrees, extrapolate from...

You have an air cooled unit. The liquid line should not be cooler than the ambient air. The restriction will need to be fixed before you can get an accurate subcool.

2 microamps before ignition? How?