msquared
Replaced the temp sender and coolant level sender on a SD00025 unit Model#10642040200 Serial# 2101048. The old sender was reading 199F with a stone cold engine-block heater not plugged. Replaced with the part# 0E0502 from Energy Systems and the new sender reads 201F. Do I have a wire harness issue?

Thanks Marc
Quote
Peddler
Is that an H panel unit?  If it is you probably need the line conditioner(not sure that is the correct nomenclature) as they use similar senders but the controller interprets them totally differently, they read a current not resistance I think.  When I checked that SN it comes up as an industrial unit which leads me to an H panel.
Quote
msquared
Yes it is an H panel, so the level sensor came with a signal conditioner but the temp sender had nothing beyond the sender. I was dealing with Energy Systems here on the west coast "the big dealer" and they didn't mention the need for a signal conditioner on the temp sender just on the level sensor.
Quote
Peddler
Not sure and I don't have access to a schematic but if you have one it would show up on the drawing.  Otherwise I would hook up to the computer with gen link and see what values are set for the temp sender.  You may have to dump a new program into the H panel from the factory based on the SN.  If this is only a 25 KW and you have to get an industrial dealer to work on it you may find it more practical to replace it with one of the units available  through the normal markets. 
Quote
cookelec
The temperature sensor has a signal conditioner. Trace the wiring back and there should be a blue colored unit that the temp sensor plugs into. The sensor is two wire and the conditioner is three wire. The conditioner is probably a part no. 0E4911C. There is a way to test the sensor back to the H panel but see if you can find it first.
Quote
msquared
Thanks for the info. Wonder why they don't sell the replacement temp sensor like the level sensor in a kit with a replacement signal conditioner.
Quote
cookelec
That was because the level sensor type was changed due to earlier problems and when it had to be changed, the new probe required a different signal conditioner.
Quote