Other than the heat exchanger, what will low TA affect in a heater?

[Sillius Soddus]

Well James, that's about as informative as your preceding posts.
Didn't take long to exhaust the useful knowledge of this group.
Over and out.

 

[1poolman1]

Of course. My bad.
I will check the water contact components when it is opened up.
But I guess we are back to my original query.
Are there heater parts other than the exchanger that tend to be affected by low TA induced pH changes?

Strategy (sort of): The heater is currently working as expected, but the amount of removed shrapnel and pool surface staining indicate damage.
I'm waiting till June or so when ambient temps here will keep the pool usable without heater.
Then bypass heater, strip and repair.
I would like to have the parts in hand at that point, so if I can determine via this group's wisdom that the exchanger is likely the only part then it will be cost effective to go this route.
If other parts are likely involved, it changes the calculus.

Anything made of metal that is in contact with the pool water can be damaged. Pressure switch, temp sensor (thermister), high-limits (both the HLS and the AGS), bypass valve spring, the bypass valve itself though it isn't metal (look at enough and you can see the damage low TA and pH cause), thermal regulator, thermal-regulator spring, tube bundle, tube bundle mounting flange if the O rings leak, and all O rings that maybe needed to seal as they will dry out, which includes all flange O rings, all union O rings, all internal manifold O rings, castle-nut O ring, manifold mounting bolts.