Could simply be low on coolant, or have an air pocket, or the t-stat.
As you said, it usually means the alternator, and it's typically the brushes.
It may just be a coincidence that it's all happening at once, and is unrelated.
Could simply be low on coolant, or have an air pocket, or the t-stat.The idle surges and the tempature gauge goes to hot. The air blows cold instead of hot, ...
As you said, it usually means the alternator, and it's typically the brushes.... and the battery and brake light stay on.