SOURCE: High-pitched noise
Could you specify if noise is coming from : - The freezer - The outside back of the refrigerator - The bottom of the refrigerator
SOURCE: MR. Heater Portable Buddy model MH9B
the mr heater series units have a millivolt generator connected to a very small sensitive electromagnet in the valve body. inside the generator is a small insulated wire connected to the very tip of the generator. that and the outside copper tube forms the j-k junction. at the other end, the part that goes into the valve is a silver button and a gland nut. this forms the other part of the electric circuit. the inside of the valve has a spring and an iron slug with a rubber pad. the slug gets sucked into the electromagnet when the magnet is operating and holds the pad off its seat allowing propane to go through the regulator and valve. change out your generator and I'm sure your problems will be solved. mr heater has a web site.
SOURCE: Mr. Heater Buddy Portable Problems...
ok, your unit must be propane. look on the back where the propane line feeds the nozzle. there should be a very small copper line with two spade connectors on it. this is your millivolt generator line. with a flame at the nozzle the generator makes a very small electrical current which feeds to the main valve and keeps it open. take a piece of wire and jumper these two spade connections together and try lighting the unit again. if it stays on, the hi limit is shot. you can get by with the connections jumped out, you just don't have the safety margin if it were connected. IF with the spade connections jumped out the unit still shuts off, the generator tube needs to be changed.
SOURCE: Won't turn on.
Thats sound it's because the horizontal IC are in bad conditions and need to replace it.Good luck.
SOURCE: high pitched noise red light blinking
A high pitch noise comes normally from blown capacitors from the motherboard or the power supply. But mostly high pitch noise comes from power supplies.
You could have to open up the power supply to see them.
Verify if it is the case and replace the faulty part.
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