Yes, those temperatures are concerning considering the thermal limit for your processor is 100C (212F) according to intel. The fans should respond accordingly and you should not have to manually tamper with them in order for them to do so.
First, make sure you have downloaded the latest firmware/software updates for your model:
Finder Menu Bar > Apple Logo > Software Update...
Try resetting the SMC:
Runaway applications can cause this:
If the issue persists, bring your machine in to Apple.