I was cleaning the dishes and suddenly the hot water abruptly stopped flowing and was left with only cold water flowing. I checked the hot water supply line and it still worked. I took apart the lever with the cartridge and hot water wasn't flowing up to that point either so I assume the issue is in the supply line for the faucet? The brand is Grohe, model # 30213DCO.
This is a link to the manual: https://cdn.cloud.grohe.com/tpi/1000/1900/1950/1956/1956824/original/1956824.pdf?_ga=2.225100888.378557502.1525614592-455172165.1525614592
Is there any way to fix this??