My beckett 300gph pump trips breaker and works

After 30 minutes of use, feel the outside of the breaker that is tripping. If you feel heat on the surface of the breaker it could be the breaker is going bad. Have an electrician change the breaker and have him check the load on the breaker. My guess is, if the heat pump seems to runs fine for an hour but is tripping a breaker then it is probably not the heat pump.

1) Not likely the timer is problem, unless there was fire or overheating in timer box. Use nose and eyes to inspect for signs of high heat.

2) Eliminate timer as suspect:
Move wires on timer to test if timer relays have gone bad.
Move terminal 4 to terminal 3
Move terminal 2 to terminal 1
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T104

3) Check watt rating of Hayward pump, and voltage.
1Hp motor at 240Volt draws 8 amp, and can draw 6 to 8 times that amount when starting. Up to 100 feet, should be at least 12 gauge wire and double-pole 20 amp breaker. Over 100 feet, 10 gauge wire and 30 amp double-pole breaker is best.
http://waterheatertimer.org/Color-codewire.html#motor

4) Intermatic T104 240V timer is rated 40 amps
Can safely handle 1 Hp motor without nearing heat-rating capacity of timer

5) Make sure the motor is wired correctly for 240Volts.
If motor is wired for 120, and 240 is applied, then tripped breaker can result.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Sounds like there are too many things running on the same breaker. Try unplugging some of the other things on that breaker.

Yes, you have a short! It is probably between your neutral and ground. That is why your GFCI is tripping on your outside outlets, but won't trip the non-GFCI breaker on the inside.

I had the exact same issue. I left mine out for the winter and when I plug it in, the breaker trips. My warranty was up so my friend took it apart. The seal had broken alowing water to leak into the bottom the pump where the wires connect to top of motor. This is supposed to be water free and is protected by several seals.

I am currenlty trying to put sealant where the cord goes into unit to stop water from going in. I will let you know how that works.

One tip my friend recommeded is to make sure there is no stress on the cord as it appears this seal is weak and and kind of stress will break it. hope this helps -- Rob

two different problems here! first when it trips the breaker and you try to reset the breaker and not turn off the compressor on its pressure switch it does not unload the air off the head of the pump when you try to start it again,,, ( when it shuts off normally you hear the air drain near the switch,, this unloads the pump to restart)

The most likely reason it is tripping the breaker is that the second stage (smaller cylinder) is not doing the work it needs to do and the first stage (bigger cylinder) is pumping more now!,,,, higher pressure on this side makes the motor work harder.

I would advise rebuilding both sides to get the pump back up to correct running levels it had new.

If the seals are damaged, water will leak into motor section and cause GFI to trip and yet the pump will seem that it is running fine if plugged into a non-GFI receptacle

The circuit breaker trips because there is an electrical short in the pump itself or in the wire feeding the pump. A cause of this could be a bare wire, or a crack in a wire. Remove the pump and put it in a five gallon pail of water and test it. If it still trips the breaker you will know the problem is in the pump or the cord to the pump.

no you need to put 60amp breaker in house panel box

The best solution to ice in garden ponds is to keep the water moving as moving water will not freeze. Depending upon the size of your garden pond you may try adding a fountain. All major pump brands carry small fountain pumps that include various fountain spray nozzles/heads or you can buy the pump and then purchase a Fountain Head Kit separately. The fountain will provide 1 - movement of water at the surface, 2- aeration for the pond, 3- pleasing sounds year round, not to mention the 4- aesthetic value. The added bonus is that you will not have to worry too much about shorts if you use a submersible pump. So try dumping the deicer and go for a fountain.