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I have a Trane (2yr old system) 4TWR5048E XLi heat pump that makes all sorts of loud noises. What causes the loud banging noise?

Post created: 2013-03-13 Type of Equipment: Heat Pump Views: 158

I have a Trane (2yr old system) 4TWR5048E XLi heat pump that makes all sorts of loud noises. What causes the loud banging noise? grinding brakes noises when the heat pump is cycling into auxiliary heat mode in cooler temps - around 35 - 40 degrees? We are in Texas so it rarely gets below 25 degrees. The noise disturbs our sleep and yet the service techs tell us that are normal and do not seem to know how to fix the problem. Is this normal for heat pumps and if not what are the issues that could likely cause these problems. Thanks for your help.


On 2013-03-14 JB wrote:

Without more information it is hard to be specific, but if the grinding noise is worse at higher temps (maybe 35-40) then it could be that the defrost cycle is operating when it is not supposed to. Your HVAC tech should be able to make an adjustment so it works properly.

The grinding could also be caused by worn bearings, though given how young this system is it seems that the bearings should be okay if everything is running properly, but you never know.

The banging noise could also be caused by the system not defrosting properly as well such as a bad defrost board.

To keep legal happy, let me just say that I am not an HVAC contractor, and you should never even look at your furnace without having a qualified, liability accepting HVAC contractor present.  To keep sales happy, let me just say that you can find an HVAC contractor that's happy to take your money here: http://www.furnacecompare.com/perl/find_contractors.pl.


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