I am looking to purchase a used Hampton Bay

its the fan thats not working mayby

I would contact the manafacturer. I fouond the 270 at: http://www2.munters.ru/pdfs/MH270.pdf. The contact information is:
Munters Europe AB
Dehumidification Division
Box 434
S-191 24 Sollentuna
SWEDEN
Tel: +46 8 626 63 00
Fax: +46 8 626 63 65

it should be in the same area where you pull the pan out to dump. There should be a hose hook up inside the space where the drain box is.

you are low on the freon charge you need to take to a service shop
were they can charge it.

Well life span is 3-15 years depends how long and hard you run them. 45 pint is about 1000sqft basment. rule of thumbs bigger better. run less and do a better job. I would start by filling the bucket and place in a dry shower see if you have a crack. cant find a source for the bucket discontinued this might be your problem. http://www.repairclinic.com/SSPartDetail.aspx?s=t-M7DH45B2A-%3d%3di1025984&PartID=1025984 Repair cost are about 40-50 and hour!!!! good luck

do not collect water

change control

You may get a better effect if you ventilated the crawl space.

Wow, this must be an extreme environment! I think you need to look at something industrial. http://www.airtreatment.co.uk/index.php?main_page=index&cPath=6_7&gclid=CKKjn8ye_Y4CFQ3ilAodN2wQvw

have you turned them off, waited a long time, and restarted? if yes, but still problem, both have developed freon leaks. the coils may have "frozen over", verified by looking at them-do they appear frosty? caused by humidistats that are not functioning properly (starting to corrode)...try turning down the stats to allow motors to rest (and frost to melt)