Went out to a Williams Walk In Cold Room today with one of those integral evaporators. Evaporator was just one big block of ice. First suspicians were that either the defrost heaters were faulty or the sensor for the defrost timer, one of those electronic gizmos, Eliwell type.
My question is, how on earth do I defrost an evaporator without the use of heaters. Kitchen is hot, food is going off, chef is fuming. Here I am with a little blow dryer trying to melt the iceberg, no luck......its going to take ages with water droplets falling on my face.
With those electronic controllers I havent got a clue how to bypass the defrost termination sensor and initiate a continuos defrost.
One last moan about the Williams, thank goodness the evaporator heater element was working, but if it wasnt how the heck do I remove and replace it without major surgery?
I couldnt believe this was a Williams unit, they used to be the most service freindly units I had ever come across.