Up until recently pressure was usually 5.x-6.x PSI. now I routinely see low 7's (in the yellow) with spikes into the 7.9-8.5 (red warning). Sometimes it stays there, other times it drops back to normal. Never low. Based on that I have not been to concerned, but as it is happening more frequently I am seeking advice. If it is not a bad sensor, does high pressure present a problem?