User Guide

ManualsBrandsLaars ManualsBoilersNTH-105 96,000 BTU Neotherm Residential High Efficiency, Wall Mount Heat Only Condensing Boiler (NG)

36

Service Manual NeoTherm 80 - NeoTherm 285

Checking the Blower

B18

Yes

Blower goes

to full speed?

Replace the SOLA controller

See Section D8, D9.

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)

System sensor - Section B22

DHW sensor - Section B23

Short contacts

for call for heat:

CH: TB7 5-6

DHW: TB6 5-6

Blower does not run

Bad blower. Replace the blower.

See Section B19.