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HVAC

line.my

Mechanical
Mar 10, 2025
4
Hello everyone, I was wondering what it means when an RTU has CFM over amping
 
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Do I need to replace the unit if this happens? If not, which part should I only be replacing?
You should hire a technician to investigate and take measurements. There is a chance an engineer is required to determine what is wrong and what the solution is.

I have no idea what "CFM over amping" means. Too much current at a given cfm? How was it measured and who determined what is too much?
Filters clean?

"My car uses too much fuel. What could it be? But I don't tell you what car I have, nor how much fuel it uses, nor how I drive, or what else is going on."
 
You should hire a technician to investigate and take measurements. There is a chance an engineer is required to determine what is wrong and what the solution is.

I have no idea what "CFM over amping" means. Too much current at a given cfm? How was it measured and who determined what is too much?
Filters clean?

"My car uses too much fuel. What could it be? But I don't tell you what car I have, nor how much fuel it uses, nor how I drive, or what else is going on."
Thank you for the response, I just found out what CFM means here, its condenser fan motor.
 
In full English this means Roof Top Unit has Cubic feet per minute (presumably air volume flow) over amping (seems to imply it is taking more electrical power than it should?)

As such the phrase makes no real sense as air flow has no direct connection to electrical current.

A guess is that the air flow is more than the roof top unit is capable of handling and is drawing too much power, but that's just an educated guess. The blind leding the blind here I think.
 
In full English this means Roof Top Unit has Cubic feet per minute (presumably air volume flow) over amping (seems to imply it is taking more electrical power than it should?)

As such the phrase makes no real sense as air flow has no direct connection to electrical current.

A guess is that the air flow is more than the roof top unit is capable of handling and is drawing too much power, but that's just an educated guess. The blind leding the blind here I think.
Thank you for the response, I just found out what CFM means here, its condenser fan motor. So i need to replace just that.
 
Thank you for the response, I just found out what CFM means here, its condenser fan motor.
Definitely hire someone local to look at this.

99.99999999999% of users here would assume CFM in relation to HVAC means cubic feet per minute. Including people living in the metric World.
 
It means you need to trouble shoot to find the cause.

Randomly replacing parts is an expensive way to do maintenance.
 

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