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PROBLEM
No hot water
at faucet
Water at faucet
too hot
SECTION IX
TROUBLE SHOOTING GUIDE
CAUSE
Boiler does not
operate
Circulator does not
operate
Improper aquastat
setting or
calibration
Zone valve does
not open (if used)
Electrical problem
(relay, wiring, etc.)
Scale build-up
Clogged cold water
filter or boiler
supply strainer (if
used)
Improper system
plumbing
Improper system
wiring
Aquastat set too
high
SOLUTION
Refer to boiler installation
instructions
Check main service
switch
Check fused disconnect
Check power supply
Replace as necessary
Turn tank aquastat to
appropriate setting
Check power supply
Replace as necessary
Check fuse and replace
Check circuit breaker and
reset (if applicable)
Check power supply
If boiler, circulator, and
tank are operating
satisfactorily, coil may
have scale coating. See
Section VIII:
Maintenance
Clean or replace filter or
strainer
Compare plumbing to
Section V
Compare wiring to
Section VI
Lower aquastat setting.
See Section VII
32
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