power washer solutions

[hvacdoctor]

My company has 2 power washing trucks to clean condenser coils. power washers basically sit inside a box truck and are vented. They also have a generator style boiler to heat water and soap mixture. The problem is we keep breaking down constantly. Like every few weeks at least one unit is down for service. Does anyone else know of a better powerwasher set up? FYI one system is in a van and was rebuilt last year, second system is 2 years old in box truck.

[gtt]

The outfit I'm currently with has the service techs carry on each service van an electric power washer (Husky 1750psi, about $200 from Home Depot). I carry about 10 gallons aboard the van in some water jugs I found at Walmart for remote phone and cell huts. This machine can clean the coils of an average Bard wall unit with less than five gallons. Also have 75' of garden hose aboard where water is available. Had a helper DROP the one for my van from a roof on his first day on the job, and it broke the wheel and the water inlet bib. Since it is electric and relatively light I can get it up to most roofs and clean the evap coil as well, take a tarp to shield the water from electrical components, and I can wash them in place.

[glgto]

do your units have a bypass? even with a by pass the unit isn't made to run more than a couple of minutes 2-3max without the trigger being pulled .bypass water will heat up and cavitate pump. we have a 200 gallon tank mounted next to ours and we ran the bypass line into one outlet on the bottom and the higher inlet line on the bottom is where the water goes in so we can take water to job or fill into tank while running. it will run all day without overheating. the other problem you may have is are your techs bleeding ALLor the air out before starting pump?