Hello, I had a Tranquility 27 system installed in my home at the beginning of last winter, I am approaching my 2nd summer with the unit and have a concern....Last summer I had a musty smell coming from my vents when the unit was on only in cooling mode, I contacted my dealer and they said they had never heard of this, they said they could investigate upon my next maintenance check up. They would not come out to see if there was an issue unless I was paying for a service call, this was within 1 year of having the system, I thought it was a bit strange, they said they had researched this issue and come up with no answers without making a trip to my home to inspect. I was wondering if anyone had any insight to this issue, it is only during the cooling mode and does not smell like that in the winter. Its a musty smell and my basement is dry and even blocked the cold air return in the basement to ensure it wasn't cycling some weird air from the basement even though my basement doesn't smell like that(that was their suggestion). If anyone has some suggestions that would be great! On a side note I am having a smelly hot water issue and believe its an anode rod issue(only recently though), it is being addressed immediately, is there a chance they are related? i would just like to address this prior to the summer. Thanks in advance for any help!

Just a thought:  Make sure the condensate is draining to the exterior instead of staying in the drain pan during the cooling cycle.  Drain pans usually have  primary and secondary drains, so make sure both drains are open.

If you discover that your water is reacting with the anode rod in the water heater, then consider using a water heater such as Marathon that does not have an anode rod.

Are you referring to the drain inside the unit? Is this something I can check myself or should I have the original installer come and check? I will have to pay for this service so if its something I can check that would be great! Thanks for your response, I have a condensate pump on the outside of the unit to pump water to my drain, I assume your not referring to this.......

In an air-to-air system there is a condensate pan under the coils that catches the condensate during cooling that can be visually checked.  In the unit you have I do not know how easy it is to check the condensate pan.  However, if you have a condensate pump, then you should be able to tell if it is pumping condensate to the exterior during cooling.  Try to trace the condensate drain to the exterior to see if any water is dripping from the line.  This will give you some feedback but there is still a chance that some water is staying in the pan which might be supporting mold growth.

Maybe the experts will chime in and answer your question more directly than my attempt.

Hopefully! Thank you and appreciate your insight!

On an upflow CM tranquility, the pan is under the fan coil behind the upper door (blower compartment). You can check it yourself. You can also make sure drain is clear.
Did you have AC before?
j

Yes I did have AC prior to this and never had an odor issue.

Do you run the fan constantly? Did you on the previous A/C?
J

We do run it all the time now with the geo but did not with the AC.

Turn it off and try it that way before you pay for a service call.
Constant fan re-evaporates collected moisture into the circulated air when compressor is not running.
J