Fearful of weird things

my guess would be that he is not fearful  of the electric stove or the ice dispenser themselves but rather associates those objects with a the emotion of fear. Dogs feed off of your emotions and often take direction from you. This is not an impossible task to change his fear of these things, however it may be very beneficial to get the help of a qualified behaviorist to come to your house so that he can evaluate you, your dog and the household environment and find the trigger for this behavior.
 
 
 
 
 

Have you started any obedience training with him?  Any experience that you can expose this dog to will help him to adjust to new things in the future.  When the stove or ice dispenser goes on, happily ask him for a "sit" or "shake" or anything to get his focus on you, when he complies, even hesitantly, praise and treat him.  In fact, there is a treat method called "jackpot" where to break a treat up into tiny pieces and feed it to the dog over a 30 second time period while you are smiling and praising.  In other words teach him associate the noises in the house with good things. 

On the other hand, don't fuss over him when he's being scared.  Fussing is attention and only reinforces his behavior.  When he scurries away, call him to you with a happy voice and a wonderful scrumptious treat.

He might going through a "fear period" in his development or he might just be a sensitive  dog.  My race is always a bit cautious about things, but as time goes by, the time that she takes to assess the situation gets more and more brief and then she looks to me or my DH for approval and she's fine.  

when my dogs are afraid of something I hold them and sit near or infront of it and calmly pet them and do that until they are ok. []  NEVER scold the dog because he's afraid (not that you would[]) and for the big dogs hold ur dog and let the other sniff it and then make the other dog lay down and let ur dog sniff him

ORIGINAL: Juptier

when my dogs are afraid of something I hold them and sit near or infront of it and calmly pet them and do that until they are ok. []  NEVER scold the dog because he's afraid (not that you would[]) and for the big dogs hold ur dog and let the other sniff it and then make the other dog lay down and let ur dog sniff him

 
That will just reinforce the dogs fear. The worst thing you can do is coddle a fearful dog. That is sending the message that it is OK to be afraid of this strange object.
 
As for the big dogs, he will get used to them. It was probably very intimidating for your little boy to see something so huge trying to sniff him. Lots of play groups with bigger dogs will help your dog to over come his fear. Don't hold yours when meeting new dogs, this could lead to aggression - your dog feels that he needs to protect you from the large furry thing.

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