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Problem
evidence
Solution(s)
Low humidity
No water flow in Turn thermostat up to activate heat blower
humidifier
operation then check the following:
• Turn water on at saddle valve.
• Turn water off and check for obstruction in
saddle valve and filter.
• Set humidistat higher.
• Check for blown circuit breaker.
• Check all wiring connections.
• Check output voltage of transformer (24 to
29 V.A.C.).
• Test solenoid; connect good transformer
directly to leads.
• Check humidistat for continuity.
Heavy mineral
Mineral buildup on the pad closes off pores
buildup
and restricts airflow.
• Clean or replace the evaporative pad as
indicated in the maintenance instructions.
Short blower
De-rating the furnace causes it to run longer
cycles
on less fuel, and causes the humidifier to
produce more moisture.
• Call your HVAC contractor.
Drafts
Drafts are caused by rapid air changes in
the home.
• Keep doors and windows closed.
• Close fireplace damper when not in use.
• Keep exhaust fan running times to a
minimum.
• Seal around doors and windows to prevent
added cold, dry air from overburdening
your humidifier.
High humidity
Heavy conden-
This may be a temporary condition caused
sation on
by bathing, cooking, mopping, etc.
windows
• Turn humidistat down enough to eliminate
condensation.
Condensation on • Turn humidistat and water supply off until
walls
condensation is completely evaporated.
Model 55 Trouble Shooting Guide
