TM018 Raypak 131 Type A Pool & Spa Heaters REV: A
D.O.I: 8/04/2009
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33
Fault Finding Chart 8
Is leak at water temp
probe/45º high limit
adaptor?
NO
8
Is leak at inlet or outlet
water connections?
NO
YES
Is leak at 45º high limit?
YES
Tighten inlet or outlet
connection unions. Replace
o‟ring(s) if necessary. Use
silicone grease on o‟ring(s).
YES
Seal/replace adapter.
Remake using thread tape.
Replace high limit adaptor
(use thread tape on adaptor).
Is leak at water
temperature probe?
NO
Ensure temperature probe clip
is properly retaining probe and
that o-ring is present. Replace
o-ring if required. Use silicone
grease on o-ring.
YES
Is leak at water pressure
switch?
NO
YES
Is leak at in/out header to
heat exchanger union(s)?
NO
YES
NO
Replace leaking heat
exchanger.
Is leak from rain or
splashed water pooling at
heater?
Is leak from external
plumbing?
Advise customer
YES
YES
NO
Is leak Due to
condensate forming?
NO
NO
Normal operation. Condensate
may form when heater is first
started but should evaporate
as heater reaches operating
temperature. Advise customer.
YES
Tighten in/out header to heat
exchanger unions(s) or
replace Sealing washer(s).
Is leak at in/out header
bypass valve cap?
YES
NO
Tighten or replace in/out
header bypass valve cap or
cap o-ring.
Tighten or replace water
pressure switch. Use silicone
grease on switch thread.
Is leak at in/out header?
NO
Replace header.
YES
