moss (or whatever it is) is accumulating on my pool heat pump evaporator coil fins

[PoolDoc]

I can think of two options for you:

1. Call your HVAC contractor, and ask him if he does coil cleaning, on outdoor coils. If he does, have him take a look. OR

2. Post pictures on Picasa, Photobucket, Webshots or whatever, and we'll take a look.

[three4rd]

Hi,

Thanks for the replies. It was also suggested to me by a local pool technician that I check with a HVAC company. The local pool companies have not run across this problem, although I was told to try simply running the heater for an extended period of time and that it will burn off the growth. I have not tried that yet but will. I'm a bit skeptical of this suggestion but I guess it's worth a shot.

Best,
Keith

[Poolsean]

Running the unit will not burn it off. It's liquid refrigerant running through it, and at it's coolest point, so there's no heat generated there to burn it off.

You can try a greatly diluted chlorine mix in a spray bottle (2 oz bleach to a quart spray bottle). With the unit off, so it's not sucking the mixuture into the heat pump, spray it on and let it sit a few minutes, it should start turning brown, indicating that it's killing it. Then rinse off thoroughly with fresh water. Rinse the inside of the unit too, in case there was some spray that got to the inside of the unit.

HVAC companies haven't heard of this? I would think that if they provide Preventative maintenance and evaporator coil cleanings, they would have chemical solutions to getting rid of it.
How about your local Home Depot of Lowes?

[three4rd]

Poolsean - Thanks for the helpful reply. I think in my research on getting rid of moss and lichen I came across the suggestion to use a mild chlorine / water solution. I can't see that this would do any harm to the evaporator, and if it kills whatever is growing that would be great. I have not yet contacted any HVAC companies, but plan to do that. I'll probably try the chlorine first.

Keith