Navien CH-180 User's Operation Manual - Asked Questions

Space Heating side 

malfunction

(DHW)

Is the setting 

temperature

too low?

Use the center dial on the

remote controller to

raise the setting

temperature.

Make sure the power is on, 

and plugged in to the

outlet with the correct

voltage. Tap “ON/OFF”

then tap the heating

button, and raise the

setting temperature.

Make sure the current

time setting is correct.

Then adjust the timer

settings to where the

system is desired to run.

When the unit is heating

for DHW, the heating

side does not work.

there is a standby time

between switching form

DHW and heating

(3 min).

Clean out filters that

belong to the heating

side.

When the unit is in 

“preheating” mode the

heating side is placed

into stand by.

Is there power to the

System, or is the 

system

In stand-by?

Is the “24 hour” timer 

set correctly?

Is the system running 

for domestic hot water

(DHW)?

Is the filter on the 

heating side 

restricted?

Is the pre-heating 

icon blinking on the 

remote controller?

 Problem 

Possible Cause(s) 

What to do

Basic Troubleshooting and Frequently

Asked Questions