Using your ohmmeter, each heater bar should measure about 130 ohms. If the heaters test fine, then go to the next step. Each of the heaters has a thermistor that should drop in resistance. By the way, this would also be a good time to check to see the thermistors drops in resistance. While leaving the ohmmeter leads in the connector of the heater bar, grab a hold of the 90 degree bend of the heater bar and your own body heat is enough heat to cause a good thermistor to drop in resistance.
Liquids getting onto or into the board can be costly.
One way to prevent this from happening it to make sure that the cover's foam is in tack and that the cover is installed correctly. Replacement parts for medical, dental, hospital and laboratory equipment. Inc. All Rights Reserved.