My heater seems to start just fine. Blower comes on for a short time on low speed. Then I can hear ignition and heat comes out of stack. After a short time, the blower kicks into high gear and everything seems fine. Then a hear something actuate, and water seems to be flowing out of the heater....this is where it gets strange. It sounds like gravel being pushed through the line, and then the flow stops. The heater seems to stop firing, and after a minute or so the fan slows down, and the process starts all over again. After usually three times I get a service error and it says "Air Flo Sw". Any suggestions?
Tandy 400,000 BTU Pool/Spa heater
- Thread starter rags51
- Start date
Thank you for your response. I have removed the top of the unit, and cleaned everything that I can see and get to. I saw a bypass valve online...is that something I should be able to change? The intake and outlet of the blower are clear, and the blower seems to work just fine. The unit is about 5 years old, and has worked flawlessly until now.ps0303 said:
I believe any homeowner with good mechanical knowledge can check it out to see if it's in good shape or not.
I ordered the bypass valve, and you were correct. The cone shaped end of the valve that I removed was destroyed. The problme is, it also broke the header inside (where the valve seats), so now I had to order a new header. That one hurts!!! The saga continures, but I am feeling more confident, thanks to your help.ps0303 said:
ps0303 said:
Here is a picture of the broken valve, and the piece that broke off inside the header. The piece that was broken off of the header was making all of the noise, as it is large enough so that it wouldn't fit through the outlet. I have no idea where the small pieces from the cone end of the valve went.
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Cheap plastic. Parts of the other end are probably stuck in the piping somewhere or are in the pump basket.
ps0303 said:
I agree, regarding the cheap plastic. The new parts are of the same plastic. The heater is only a little over 5 years old. I checked the pump basket, but found nothing. Like you said, they are probably in the plumbing somewhere.