Hello. We have been having issue with our 7890B GC that we run Simdis D2887. We got this issue last week and we restarted GC. Worked fine for a couple of days then is now doing it every day, multiple times a day during the sequence runs.
The GC is working perfectly for weeks then it starts getting these "Front inlet heating too slowly: Temperature shut down" errors.
We have done maintenance on inlet - Brushed the inlet out, changing septum, washer, liner, column nut and then reinstalling column. Still getting error. We then checked & cleaned jet. Still getting error. Then replaced entire column & inlet consumables. Still getting the error.
We changed out the heater temperature sensor for PTV/TPI 7890 and this did not fix the issue. Inlet comes to set inlet temperature of 100°C quickly no problem. Once the oven temperature is ramped the inlet temperature is to increase 10°C/min. The front inlet temperature rises but not as quickly as it is meant to. Back inlet does keep up.
Is this then a heater block issue or a fan to inlet issue or both?
