Sundance Metro 2006 FL1 Broke unknown fitting

[Lineman7]

I got above hot tub out of commission. Got the dreaded FL1 code. Did everything possible to fix. Decided maybe it was the circulation pump. It's pretty corroded. I noticed this fitting leaking and when I went to check it... it just broke off. I have no idea what it's called or where to look for a new one. Any help would be greatly appreciated. I'll get some pics coming in a second.

 

[Lineman7]

 

[RDspaguy]

Never worked on a Sundance Metro, so I couldn't say for sure. It looks like the pressure switch port on the inlet of a "trombone" heater. In which case, it would explain your fl1 error. Sundance, in my experience, does not use this heater, and uses a flow switch, not a pressure switch. But, again, I have never heard of that model.


Is this what your heater looks like? This one is from a Caldera, but many spas use similar heaters.
The piece inside is threaded, and can be got out with a screwdriver and a few choice words.
Can you post a pic of the part it was connected to?

 

[Lineman7]

Never worked on a Sundance Metro, so I couldn't say for sure. It looks like the pressure switch port on the inlet of a "trombone" heater. In which case, it would explain your fl1 error. Sundance, in my experience, does not use this heater, and uses a flow switch, not a pressure switch. But, again, I have never heard of that model.
View attachment 170204
View attachment 170206
Is this what your heater looks like? This one is from a Caldera, but many spas use similar heaters.
The piece inside is threaded, and can be got out

Thank you a lot!
So.. here is what it went into. A hose goes in the top of it. Then mates to the back of the box.

 

[RDspaguy]

Looks like they used the pressure switch port as an air bleeder. To my knowledge they do not sell that piece separately. The threaded piece (3/8" mpth x barb adapter) will come out, but if it broke off where it connects to the heater you'll probably need to get a new heater.

HQ Low-Flow Heater for Jacuzzi/Sundance 4.0kW

Low Flow Hot Tub Heater for Jacuzzi/Sundance spas. 120/240V, 4kW trombone heater w/ ¾" barbed fittings. 26½" L x 5½" W. Made in USA by Therm Products

www.spadepot.com

Looks like they improved the design a bit.

 

[Lineman7]

Looks like they used the pressure switch port as an air bleeder. To my knowledge they do not sell that piece separately. The threaded piece (3/8" mpth x barb adapter) will come out, but if it broke off where it connects to the heater you'll probably need to get a new heater.

HQ Low-Flow Heater for Jacuzzi/Sundance 4.0kW

Low Flow Hot Tub Heater for Jacuzzi/Sundance spas. 120/240V, 4kW trombone heater w/ ¾" barbed fittings. 26½" L x 5½" W. Made in USA by Therm Products

www.spadepot.com

Looks like they improved the design a bit.

Thank you for your time and knowledge. You got me where I needed to go. I was able to unthread the broken piece of the barb adapter. Gonna get a new one and pump.