Question about Presto HeatDish Compact Heater
After about 10 minutes the buzzer (like when the unit is tilted) goes off
I rewired my heat dish. I UNPLUGGED THE HEAT DISH. I loosened the three screws on the back and removed them. Then I unclipped the dish at the bottom. The dish should be loose and the bottom section of the dish should be detached from the plastic casing. Look inside the casing at the bottom. There is a red cable attached to the buzzer (it’s the silver metallic piece). Detach the red cable from the buzzer. Now look directly behind the buzzer is a black wire that connects to the circuit next the buzzer. Attach the red cable to the female receptor foot the black cable. Plug it in and it should work fine. This will permantly disable the buzzer, SO YOUR HEATDISSH NOW LOINGER HAS A WARNING SYSYTEM. IF YOU TURN YOUR HEATER OVER THE BUZZER DOES NOT GO OFF, THE BUZZER ALSO INDICATES OVERHEATING OF THE UNIT. SO BE CAREFULL. MAKE SURE THE UNIT IS UNPLUGGED WHEN WORKING ON IT. GOOD LUCK AND BE SAFE
Posted on Mar 06, 2008
DO NOT DISCONNECT THE BUZZER! This is dangerous and unsafe.
There is a design flaw within the unit. You need to do 2 things.
1. Clean the surface of the dish very thoroughly. You can use a pair of plier to bend the edges so you can pull off the front cover.
2. There are 3 screws to remove the back of the dish. One at the top and two at the back to remove the plastic back stand. Now drill tons of holes in the top of the plastic stand and down the sides. The more holes you drill the better. What is happening is the heat is building up at the top of the unit tripping off the heat sensor. By venting the top, this won't happen anymore. I have no idea why they didn't do this from the factory. The system has to have air flow.
Also, you cannot buy replacement parts from Presto. They are worthless.
Posted on Nov 14, 2008
I think almost everyone has this problem at one point or another. I actually managed to get through to a customer support person on the phone at Presto (or its successor company; can't remember which atm). She said the only solution they knew of was to clean the inside of the dish carefully. I asked about rewiring to bypass the buzzer and she said that she had heard of ways to do that but was too electrically challenged to offer much help.
I had an enormous problem cleaning the dish because of the cage until I figured this out: you can use a wire cutter to remove enough of the cage bars to be able to get your hand inside the cage. If you do it symmetrically, it looks as if that was the original design.
Even cleaning the dish throroughly hasn't stopped the buzzing. Next step is to try re-wiring it. I'll post the results.
Posted on Feb 19, 2008
Thanks to both for your suggestions...I, too, have had the problems you both stated. It is a shame that Presto does not offer support for this heater. We are on our second in the past 5 years. They work great while functioning at 100%. We through the first one away because it started buzzing all the time.
Posted on Dec 27, 2007
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