Furnace making funny noise

[Jstpssng]

Hi, guys, problem solved! (I think.)

I finally got a dealer expert to tell me what the problems is, and here is what he said:

"It痴 a piece of foil tape buzzing, he just needs to run his hands around all the taped seams to track it down."

LOL!

I read that and almost sprayed my drink all over my screen... this forum really needs a coffee-spewing emoji! :laughing:

 

[Fuddy1952]

We have three Lennox propane furnaces, installed about 15-20 years ago. Only problem I've ever had was the condensation pump (it's like a shoebox sized sump pump) if it's real cold, like zero or below the discharge hose would freeze going outside.
One day I fixed that problem using small (1/4" I think) copper tubing about a foot long. Outside I drilled a hole bottom of PVC plastic exhaust pipe, hole tilted up. Copper pipe through then hose on it. J B Weld around hole. When furnaces run, exhaust heats copper so it can't freeze.
We used to have oil furnaces, constant maintenance. Once I remember I had transformer door open, checking for high voltage with screwdriver! Across tabs. Fuel ignited blew me across room. I looked in mirror, wife said I looked like Al Jolson. To this day my eyebrows haven't completely grown back.

 

[check]

What about the holes in the barn floor? Any foil around them?

Gheez, good question! And I need to count them again to make sure they haven't started multiplying again. Just have to get them pallets outa there.:laughing:

 

[Industrial Toys]

The time to find out if a furnace utilizes $800 fan motors (sometimes more than one), is before you buy it.

Seems no one ever asks the right questions anymore and don't know what they are buying and then are "SHOCKED".

Those quiet to ramp up, computer controlled motors are going to be much more expensive than the original purchase price. Had a long talk with a service technician once about the unnecesary and expensive furnaces his industry pedals.

 

[Sigarms]

The time to find out if a furnace utilizes $800 fan motors (sometimes more than one), is before you buy it.

Seems no one ever asks the right questions anymore and don't know what they are buying and then are "SHOCKED".

Those quiet to ramp up, computer controlled motors are going to be much more expensive than the original purchase price. Had a long talk with a service technician once about the unnecesary and expensive furnaces his industry pedals.

Up to a 5 ton blower fan motor in single phase, please let me know what furnace uses two blower motors, please Perhaps a blower motor and inducer motor, or two pressue switches, but never came across anything in a long time with two blower motors unless the furnace was twinned (with another gas furnace) for a light commercial application.

If you read the thread, the motor is under warranty, and it's "free", the OP only had to pay labor.

When your hvac system is past it's parts warranty, it's time to at least get a quote on a new system with new warranty depending on what's wrong, particularly when it's pertaining to refrigerant issues.

 

[Industrial Toys]

I don't know. The NG furnace on site (security customer of mine) where I spoke with the tech did. Guy said his outfit pushed these expensive (and more expensive to repair) furnaces as a matter of profit.
Maybe fan for air circulation (for sure) and the other for combustion air or exhaust. Nothing needs to be computer controlled, but they are. Sort of like a modern Diesel engine. lol

AND just to add insult to injury, this was a dozen years ago, furnace was out of order for months, waiting for parts.

 

[RalphVa]

Hi, Folks, I need to identify a noise that my high efficiency propane furnace is making, and I am hoping some of you have heard this before. The supposedly experienced service guy could not tell what it was, and so he just "guessed" it was the ($800!) fan motor.

It is a Payne Model PG96VAT48080 furnace, installed in August of 2013, and has worked fine up until now. But just recently, every once in a while there would be this strange kind of buzzing/honing sound when the fan was going full blast (e.g, on AC).

Here is a video link:

IMG 1884 - YouTube

It is very intermittent, and seems to only come on when the fan is on high.

Any ideas, my fellow TBNers?

James

Can't help with yours, but our heat pump fan was making a strange noise once. Turned out it was a dead snaked body hanging from one side of the fan. The fan was hitting it periodically and making a rattling noise.

Wife found some more snake skins in the encapsulated space now. She put out some glue traps to catch the snakes so we can take them out a release them with some vegetable oil.

Ralph

 

[Industrial Toys]

Thank you for your kind spirit to the critters!

 

[Sigarms]

I don't know. The NG furnace on site (security customer of mine) where I spoke with the tech did. Guy said his outfit pushed these expensive (and more expensive to repair) furnaces as a matter of profit.
Maybe fan for air circulation (for sure) and the other for combustion air or exhaust. Nothing needs to be computer controlled, but they are. Sort of like a modern Diesel engine. lol

AND just to add insult to injury, this was a dozen years ago, furnace was out of order for months, waiting for parts.

If you make a statement, and someone asks you to verify that statement as fact, don't say "I don't know" I don't know of any furnace that has two blower motors in it and I would like to know who makes such a creature (two blower motors means two blower wheels, and no residential furnace is made to my knowlege more than 24-1/2" wide) as I don't know of any.

The issue with manufacuered bower motors is the control module ("brains" of the motor which could be sold seperately) could or not be sold with the actual motor.

The reality is if the part is under warranty, you don't pay for the part.

For better or worse, HVAC systems are becoming more like cars where the tech needs a diagnostic tool to determine the actual issue. When a guys shows up to your house with 10k in the proper equipment to diagnose your actual issue, get ready to pay. Unlike driving your car to the dealership in town who may be cheaper than a dealer (your time and gas to get to the car dealership) the reality a business (HVAC) now has to spend time and gas to get to your house to determine what the actual issue is.

I'd like to know of any HVAC company who will do time/gas/diagnostic who will do it for free if you determine they are the right company that you decide to do the work.

 

[Industrial Toys]

Do you want me to go to the premise in question and ask about their furnace? It's actually not that far from here. I have no reason to believe the tech I spoke with was trying to mislead me as to the number of speed controlled blowers on a natural gas furnace. He even aluded to the fact that these were simple cheap motors, modified to be speed controlled, but I didn't know enough to mention that. I have a pretty good memory when it comes to conversations that interest me.