CTO Customer Service
CTO Series – Burner Will Not Light
There are a few different reasons that can cause the gas burner to not light. Following these steps may diagnose the problem. During normal operation with the burner operating correctly, there are a few sounds that can help diagnose certain problems. Normally, when the thermostat is turned up, the burner blower will begin blowing air… Read more »
read moreCTO Series – Thermostat
The thermostat is the control device that controls the temperature and sends the power to the burner. If the contacts inside the thermostat fail to connect, the burner will not get power to it. The thermostat itself is located inside the control box. With the cover off of the control box, the thermostat wiring can… Read more »
read moreCTO Series – Hi Limit Location
If the thermostat tests out good and the burner still does not light, the Hi Limit may be tripped. The reset button is located on the back side of the control box. Locate this button and press it in. If it is tripped, there will be a click when it is pressed. This will have… Read more »
read moreCTO Series – Burner Blower Blowing
If the burner blower is blowing, the following sounds should be heard. After about a 40 seconds after the burner blower starts, the gas valve should click and the igniter should buzz for a few seconds. If you don’t hear either of these sounds, the ignition module may be failing. The two yellow wires plug… Read more »
read moreCTO Series – Flame Lights But Goes Out After A Short Time
A Flame Sensor electrode is located inside the burner tube. This is a safety device that allows the gas to stay on only if the flame sensor detects the heat from the flame. This flame sensor is located at the bottom of the burner tube. This flame sensor is in the inside of the burner… Read more »
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CTO Maintenance & Cleaning
CTO Maintenance Guide
Keep your CTO or CTO-DW running longer and stronger with our regular cleaning & maintenance guide. Download the CTO Maintenance Guide »
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