[SOLVED] slow fan equals high heat

I think is the 2009 version,

I would take apart the fan and heatsink, and make sure the connection between the thermal probe and logic board is firm. After that, replace the thermal paste as it has been sitting there for nearly 10 years, probably dried up, also cleaning up all dust you find on the way. Doing this will most likely fix your problem. If you haven't noticed any changes in fan speed or temps, your best bet would be to reinstall macOS, or if you haven't yet, update to the latest software, which is high-sierra if you have a 2009 macbook.
As for a fan controller, I would suggest macs fan control. I use it for my late-2008 macbook.

Remember, this is an old laptop with a very thick CPU die, which means high temps are expected regardless. 60-90C is common and I wouldn't worry about it. If you go above 90C, you risk damage to the CPU and surrounding components, so I would recommend stopping whatever you were doing to get it that hot.

If you don't move your laptop a lot, you can buy a stand to improve airflow, as using the computer in bed or on your lap is very restrictive.

While unlikely, your laptop could be malfunctioning due to lack of power, or an old janky battery that needs replacing after all these years. To check the health of the battery, I would recommend battery health 2, an app on the app store (it's free). For replacing the battery, you will need to go inside the laptop and unplug a few wires, which thankfully is fairly easy on an old macbook. Make sure you take precautions like anti-static bands and using plastic tools to avoid electrocution or shortage of the laptop. If replacing the battery, make sure you buy from a trusted source, as many cheap third-party products from eBay will blow up after a couple months (as I learned from experience).

Your use of fan controllers could also be whats breaking the laptop, as multiple are running at once, or even just one isn't working properly. Make sure you delete all of them, restart the laptop, and then see what happens.

It also could be because the laptop just wants to keep silent to improve apple's image. You could probably modify this in the BIOS. (for this I have no idea)

If none of my solutions work, then I'm afraid your laptop has fallen victim to age, and there is likely nothing you can do.

Hope I was able to help. Good luck!

There is no need to replace the entire logic board, as this would be a waste of money for an old macbook, and it should only be a last plan Z after all other solutions have been attempted.