Kirby shampooer dispenses water but won't make foam

• First a short explanation of how the Kirby shampoo system works: Kirby uses a “Dry Foam” type of shampoo. Basically, it spreads a shampoo foam solution on the surface of your carpet. This foam needs to stay on the surface of the carpet until it is completely dry (usually 1 to 2 hours depending on temperature and humidity) As the foam dries, it soaks up grease and dirt. You then vacuum the carpet and up comes the shampoo residue along with the absorbed dirt and grease. It does a very good job on the surface but will not extract stains from the bottom of the carpet or carpet pad. Several  other brands such as Electrolux, Hoover and Koblenz make Carpet Cleaning machines that use the same system.
       So, you’ve read your manual, you’ve removed the carpet cleaning nozzle and the bag assembly from your Kirby, you’ve installed your shampoo tank and carpet shampooing nozzle tray and you start to shampoo but all you get on your carpet is a puddle of soapy water and no foam. Here’s a few things to look for:
• Make sure you are using a Dry Foam Shampoo(preferably Kirby) and NOT an extraction shampoo, the Rug Doctor shampoo you had left over from your last rental will not work.
• Make sure you have the correct mixture. If you are using Kirby Dry foam shampoo you simply fill the tank with water and put a tank cap full of shampoo in with the water. You can use other brands of “Dry Foam” shampoo, but the mixture ratio may be different, so read the label first.
• Don’t reuse last year’s leftover mixture, it’s probably no good.
• Make sure a family member didn’t pour any leftover mixture back into the empty shampoo bottle – further diluting a mixture will not produce any foam.
• Don’t use shampoo that’s seen extreme temperatures.
• Check the tank and make sure that the sponge filter is in place and if it is in place that it is not deteriorated. The sponge filter is located under the tank at the point where you attach the tank to the hole that you removed the bag assembly from.
• Check the hose that runs from the tank to the nozzle. It should have a screen in the end that attaches to the tank (older models had a cloth screen with a metal retainer, models after 1989 have a 1 piece metal and plastic screen.

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