Stubborn Monogram ZISW36DYA Not cooling pro...

To any GE Factory Tech or GE Experienced Tech: I have replaced a filter/dryer on a Monogram Refrig Model Number ZISW36DYA. It appeared to work fine when checked after 3 days...and again after 2 weeks so I never checked again. Three months later customer comes back to a non- working refrigerator and calls our shop.

I went out to find the system again in 20 in. Vacuum with Freezer temp at about 57 and refrigerator compartment closer to 78 and suspected another restriction further down the capillary tube. I called GE service help to find out if this refrigerator could have the heat exchanger replaced from the front opening. This unit is built in and through some lousy planning can NOT be removed without major remodeling that would run in the thousands. The tech at GE said the heat exchanger MUST be replaced from rear by pulling unit forward. I explained this to customer and left to await his decision to come.

It's now 2 weeks later and customer sent me a nasty letter berating me for incompetence because he had GE factory service out and they replaced the defrost timer with no defrost necessary. He also claimed that ALL the work on this unit could be done from the front.

I have several questions. 1. How can a bad defrost timer, with no defrost necessary give a reading of 20 in. vacuum on the suction side of this machine? 2. Can ALL the parts of the refrigeration system be replaced from the front opening of this machine? 3. Is it possible that the temperatures could be that high while pressure is 20 in Vacuum and the problem be a faulty Defrost timer.

Any help would be greatly appreciated. I Have been doing this for 30 years and have NEVER heard of such a combination of High temps, high vacuum caused by a defrost problem.

Confused Tech