Call light not turning on

[fifialex]

Hi, i have quadra fire CB 1200 .
The call red light in the control box doesn't go on unless i turn the wall thermostat all the way up . What could be the problem.
Please help

 

[johneh]

The thermostat

 

[fifialex]

Thank you . Apparently all the thermostat needed was a vacuuming.

 

[johneh]

Nothing like dust to screw up low-voltage electronics.