Agree with Abscate and Sveedy - I had a horrible idle problem...bought a smoke machine (simple cheap one) found 2 leaks... replaced the lines and boom smooth idle. and no issues since then.

ok guys... I got new calipers and pads and had a chance to swap them out. The pins were corroded and the pistons while not stuck were very very hard to move. The combination of crudy pins and pistons was the culprit. I took abscates advice and had new parts on hand before disassembly. That was good ...

Nice! I did hit them a few times with penetrant over the course of a couple days. I will remember the heat in the future. They were not horribly stuck, but I was taking no chances.

next up is a spring seat replacement....

I rented a scanner that had ABS. The only ABS codes were related to the wheel speed sensor and were historical as opposed to current. To bleed the ABS pump you need a bi-directional scanner with an ABS Bleed option. The scanner I rented reads coes but didnt have the operational bleed option. Abscate...

You are correct - I removed the mounting cover. The motor housing has a decent amount of dust as a result of brush wear.

Part is on order...

follow up - New fan arrived, installed and I once again have air flow - significantly better than before I might add. High five to the Volvo engineer who placed the fan where it was and made it so easy to swap out. I have done fan replacements which took an entire day because you have to practically...