Concessions on as is
I placed an offer for asking price on an as is home advertised with newer HVAC and class 4 shingles installed in 2019. My offer was for asking price plus $5,000 closing cost credits. Seller accepted.
During inspection we found out HVAC is almost 20 years old and the advertised class 4 shingles were actually class 3. I want to ask for more credits due to misrepresentation of HVAC age and roofing materials. I seem to get the vibe that my realtor does not want to go back to the seller to ask. I don't want to walk away, I just want to get lower cash to close so I can keep some savings in the event I have to replace HVAC.
Is this an unreasonable request? I figure it doesn't hurt to ask. I understand that it's an as is property but I feel it was misrepresented on those two aspects. I was looking to ask for another 3 to 5K and I'm willing to negotiate down to 2K.
Thoughts and opinions are welcome. This is all new to me. I'm going to be one of the first home owners in my family so I've never been exposed to this before. Damn, this is stressful AF.