Do we have possible lawsuit with our house inspector?

My husband and I just recently purchased a home, but beforehand (meaning before it was official) we contacted a building inspector, paid him, and then he did the inspection. Well, he confirmed that things were alright with the home except a few things such as the furnace which had mold from where the condensation line had gotten backed up and caused it to overflow rotting the wood underneath. So we contracted to have the seller fix that before we moved in. She did, but we found out we were going to have to have it replaced because the motor went out on it. Then my husband went under the crawlspace yesterday to see if there were any issues, and it's covered in mold which is something the inspector didn't ever check for and mention in his report. Do we have a case? Because he was suppose to find out everything and tell us anything that was wrong and he withheld information or didn't check one. Now we have a house with a broken furnace and mold everywhere in the crawl space.