B22 - checking the blower, Checking the blower, See section b22 – LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual User Manual
Page 51: If power is available at j2, but the blower is, Not running, go to section b22 - “checking the, Blower
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41
Service Manual - NeoTherm 500
Yes
Blower goes
to full speed?
Unplug J2. This is the
control signal to the blower.
No
Yes
Check wiring
harness. Wires
OK?
No
Replace wire harness
No
Has call for heat?
At start of test, unit should be ready to run (”Standby”)
Blower runs
Problem with temp. sensor(s)
Short contacts
for call for heat:
CH: TB7 5-6
DHW: TB6 5-6
Blower does not run
Bad blower. Replace the blower.
B22
Checking the Blower
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