Electronic Parts are not returnable or refundable once the seal on the packaging has been broken! Payment for any Electronic Parts ordered on your behalf must be made prior to any order being placed on our suppliers. Freight is at the customer’s cost! Sometimes Control boards come with installation instructions other times they do not! We install and test the new electronic parts but can not be held liable for any condition other than faulty workmanship. We charge time for whatever instruction you provide. This means if we install an electronic part and have not been informed that a programing procedure is required upon start up; then any additional time is chargeable. Including receiving instructions and technical materials.
Controller, PCB’s, Timers, Power boards, User Interface Card, Power Card, whatever the name that is used, most ovens are distinguished by two main styles: Electronic or Analogue. The electronic oven uses a digital probe to determine its temperature which in its most rudimentary form looks like this. Which connects to a Printed Circuit Board (PCB) of some sort which calibrates and uses the information from the probe to determine the oven temperature.
The benefit is a much more precise oven temperature control. The disadvantage is the cost of the electronic board(s) involved in the logic’s required to control temperature if it fails. Also PCB’s are far more likely to become No Longer Available (NLA) earlier than it’s analogue counterpart, the thermostat.
Thermostats are basically a switch controlled by a bellows that expands and contracts as it heats or cools. The bellows are attached to a copper bulb via a copper tube that is filled with alcohol. The copper is basically porous and leaks a little bit of its alcohol every year. It takes normally around 15-20 years for that leakage to become noticeable to the oven user. By that time they normally complain about burning everything or at least most things.
We can’t or more accurately we don’t diagnose electronic boards! The reason is simple! Cost! To properly diagnose an electronic circuit board we need a circuit diagram/schematic, part specifications and test equipment such as Oscilloscope, meter, etc. Manufacturers don’t make this information available.
Often when a element, fan, light or other component short circuits it causes a high current for a very short interval which stresses the components that control the power to the faulty device. For instance a relay (electrically energized switch) on the PCB can be welded shut during the fault event. Or blown clear so the contacts no longer make contact. In 80% of cases fitting a new electronic board without a full component test and verification will be the most economical scenario. However, in small a percentage of cases, other components may need to be replaced in order to complete the repair.
The challenge is to decide whether to spend the extra time to test the other devices that may have been subjected to damage during the fault event. This takes additional time and may ultimately prove unnecessary. And given the small percentage of times other devices have been damaged during the fault event we tend to recommend you take the gamble. What we do make clear is; a small percentage of times this is going to backfire. In this event we won’t be held liable for the consequence(s) of your choice.
Why tell you all this; because if you have a digital oven that has failed, it is likely you will be faced with a decision; is it economical to fix it or not!
There are a number of issues that need to be carefully considered before you make a decision to proceed with fitting new electronic parts:
- Electronic parts can not be returned once removed from their packaging.
- Electronic components come in three main forms, the User interface/display, the Main board and the sensory devices. These can be individual boards linked by cabling or they can be one. As we can’t diagnose electronic boards, the safe choice is to replace all interfacing components.
- Fitting a new circuit board without verifying interfacing components are free from damage or defect means further damage can be done to the new board.
- We take all care, but the risk/responsibility for fitting new electronic parts remains with the Customer.