I had the same problem, and I figured it out. Read on, to see if this applies to you. This percolator was received as a present years ago, and I'm not sure it ever worked right. First, some info and background. The above comments about the heating element being clean to bare metal, while valid, did not work for me. I also read other posts suggesting the thermostat might be defective, which also did not seem to apply to my situation because the water is always hot enough at the end of the cycle, not boiling, but steaming hot enough for just about anyone. I deduced the problem to be with the actual perking process, not heat or heating element. A percolator should perk before the water is at drinking (HOT) temperature, and the perking action cools the water and prolongs the actual perking process. The problem I found was with the washer at the bottom of the tube, which is supposed to act like a 1-way valve. The washer, from the factory, was apparently too loose with almost a 1/4-inch or play, allowing hot water that would otherwise perk back into the water chamber, effectively making my percolator into a kettle. I used a stainless steel washer and an e-clip to tighten the washer against the holes on the lower umbrella-shaped flange so that there is just enough room to slide a feeler gauge or perhaps a couple of sheets of paper. Now the percolator works great, fantastic actually. Watching the coffee perk at the top in anticipation of a hot cup is entertaining, and with the stainless steel pot I have no worries about phytoestrogens leaching from plastics common in drip coffeemakers. See photo of my hack if it uploaded correctly. Its high res, so you may be able to download and zoom in. Enjoy!
Percolators create coffe by forcing hot water with bubbles up the tube
and into the basket. The problem is that coffee oil and water sediment
will settle on the heating element and quit making the bubble that
causes water to rise fully up the tube. To repair this easy problem you
just need to follow these easy steps.
1) Fill with at least half the total capacity with white vinegar
and allow to heat up till finished. That will clean all excess oils from
the machine.
2) This is the second most important step that most people forget.
Use steel wool to clean the heating element. It is the hole where the
tube base goes. The color is not dark or "coffee" colored most of the
time. Only when it is very dirty does it take on this color. Another way
is to use the tube to scrap off any build up, just be careful not to
bend it.
3) This final step is the most important!!
Make coffee as normal and enjoy!
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