Not dispensing water and no suction

I'm assuming the belts are OK.... Your heater is clogged. Unplug the machine and let it sit for 30 minutes. Take the handle apart, there will be a 4 inch by 8 inch metal box inside. This is the heater. Remember I said to let the machine sit for 30 minutes? If you didn't, the heater may be EXTREMELY hot!! Disconnect the two hoses going into it, and clean the metal pieces out (that the hoses connected to) with a needle or very small drill bit. You may want to remove the 6 or 8 screws holeding the heater together and remove the cover to clean it out. Reassemble and fill both tanks with VERY hot water ONLY and run the machine to rinse the entire system.

To prevent future reoccurences... use only Bissell extraction shampoos. Never put anything in the detergent tank except shampoo. (And only water in the water tank) Mixing chemicals with anything else turns the water/detergent mix to sludge. Also, when finished shampooing, put ONLY water in both tanks, and run the machine until one of the tanks run out of solution. Doing this rinses the hose lines out and prevents hardening of the solution in the heater ports.

I've fixed these machine for years. No dispensing is almost always the heater clogged.