Spa Air Blower Only Runs For a Few Minutes Before Shutting Off - Any Ideas?

[freedom5]

I have a 2 HP spa air blower that keeps turning off after a few minutes. While it is running the bubbles and airflow are great in the spa.

I recently replaced my single speed 2 HP pool pump with a 1.5 HP variable pump. The THP are equal; however, I do see there is less flow at top speed. On clean backwash, my PSI was 25 with my former pump and now 22 on spa setting. My spa overflows to my pool too.

With previous pump, my air blower would behave this way too; however, I wanted to ask if this air blower shutting off could be attributed to less water flow. Maybe there is some sort of maintenance I need to do.

 

[RDspaguy]

Most likely it is a bad blower or an airflow blockage.

 

[freedom5]

I tested blower off of pipe and it ran for 20 mins before I turned off, I suspect some blockage though I do get a lot of bubbles

 

[RDspaguy]

Can you run the blower without the pump? Does it still shut off? If not, then it is related to the pump and you likely need new jet internals.
Spa jets are often adjustable at the jet and have air control valves along the top edge. Are these all open? It would be normal to close the air controls when the spa is not in use, and jets can be accidentally closed.
You said you get lots of bubbles, but just to be clear you should see a steady stream of large bubbles from each jet with the pump off. If not you could have a blockage, a bad blower, or a blower that is too small for the job. Has it ever worked for you? What is the hp?

 

[guinness]

Also see thread below

Spa Blower problem

When I turn on the spa blower, it comes on and runs for about 5 minutes and then shuts off. I have a silencer 1.5hp with 8 jets controlled by screen logic2. Anybody have a clue what could be causing it to shut off. It will not come back on until the next day and same result.

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