Bissell 5207f vs 5207a
images from manufacturer

Some people might think that the Bissell SpotClean Proheat 5207f would be equipped with a heater, but it’s wrong. Unlike the Bissell Little Green Proheat model that has a heater, the Proheat version of SpotClean does NOT have a built-in water heater.

Like the non proheat model, it only features the Heatwave Technology which is claimed to be able to maintain the water temperature throughout the cleaning process. What is Heatwave Technology? – The machine’s motor provides a constant source of heat, and the heat is redirected to maintain consistent water temperature. That’s it. However, you still have to fill the tank with hot tap water.

Now come back to our topic. The difference between Bissell SpotClean 5207a and SpotClean Proheat 5207f is the color scheme and included attachments. There is no mechanical difference on the machine.

The SpotClean 5207a is tan, comes with (1) 3 inch Tough Stain Brush and (1) Deep Reach Tool.

The SpotClean Proheat 5207f is blue, comes with (1) 3 inch Tough Stain Brush and (1) DeepStain Tool.

To learn more detail about these tools, you can visit bissell.com. Below are the links to these tools product pages.

3 inch Tough Stain Brush
http://www.bissell.com/3-tough-stain-tool-with-removable-nozzle-1600055

Deep Reach Tool
http://www.bissell.com/deep-reach-pet-tool-for-carpet-cleaning-machines-2037412

Deep Stain Tool
http://www.bissell.com/deep-reach-mini-stain-tool-1602134

So, based on our research, these 2 spot and stain cleaner machines are almost identical, buying which one depends on your personal preference on the color, and maybe the cost.
If you know other difference between the Bissell 5207f and 5207a, please share below.