What is the error code on my Bosch tankless?
Andrew Henderson What is the error code on my Bosch tankless?
Error code A7 – Outlet temperature sensor fault The outlet temperature sensor reacts when the temperature is either below 36 F when the unit is protected from freezing temperatures, or above 210 F in a case of overheating due to the lime-scale deposits. Check the sensor and wiring. You might have to flush the unit to remove the mineral build-up.
What does an error code A7 mean on a Bosch tank?
Error code A7 – Outlet temperature sensor fault. The outlet temperature sensor reacts when the temperature is either below 36 F when the unit is protected from freezing temperatures, or above 210 F in a case of overheating due to the lime-scale deposits. Check the sensor and wiring.
Why is my Bosch water heater flashing an error code?
This is not an error code; it is a flashing status message that tells you to check; the wiring connection, gas pressure as it might be too low, voltage as it doesn’t meet the required 120 VAC, the unit that might not be properly grounded or the issue with the control board. The primary fan spins slowly when the water heater is working.
Why does my Bosch water heater not make sparks?
The ionization electrodes are not making sparks when water is flowing. There are many reasons for this problem and here are some; low gas pressure, the fan speed is low, wire connections are loose, the air in the gas line, no gas. Ionization electrode failure during water heating.
What does an error code on a Bosch water heater mean?
Get FREE Estimates! Error codes are the indicators of the problems inside the water heater. When the error code appears on the Bosch heater’s LCD display, the reset button sometimes leads to an error removal, but if it doesn’t work, the instructions below might help troubleshoot the problem:
Error code A7 – Outlet temperature sensor fault. The outlet temperature sensor reacts when the temperature is either below 36 F when the unit is protected from freezing temperatures, or above 210 F in a case of overheating due to the lime-scale deposits. Check the sensor and wiring.
The ionization electrodes are not making sparks when water is flowing. There are many reasons for this problem and here are some; low gas pressure, the fan speed is low, wire connections are loose, the air in the gas line, no gas. Ionization electrode failure during water heating.
How to troubleshoot a Bosch tankless water heater?
Check the wire connections on the gas valve and control board. Measure the voltage on the wires when a water heater is ON… it should be 24 VDC. If the measurement is as specified, the gas valve is malfunctioning. And what do you think about Bosch? Click below to see contributions from other visitors to this page… Had a Bosch heater for 15 years.
Where is the resistance on a Bosch tankless?
The element is located at the top-right corner of the unit. Measure the resistance on the wire harness; it must be between 115 and 120 ohms. Check the backflow temperature sensor connection; it might be damaged, or it got short-circuited.
Error code A7 – Outlet temperature sensor fault The outlet temperature sensor reacts when the temperature is either below 36 F when the unit is protected from freezing temperatures, or above 210 F in a case of overheating due to the lime-scale deposits. Check the sensor and wiring. You might have to flush the unit to remove the mineral build-up.
What should water pressure be on Bosch tankless?
The voltage needs to be 120 VAC and adequately grounded. Ensure that a fan and control unit are not damaged. Make sure that the water pressure is less than 150 PSI and a flow rate below 10 GPM. Check the wire connections on the water valve and control panel.
This is not an error code; it is a flashing status message that tells you to check; the wiring connection, gas pressure as it might be too low, voltage as it doesn’t meet the required 120 VAC, the unit that might not be properly grounded or the issue with the control board. The primary fan spins slowly when the water heater is working.
What should the voltage be on a Bosch tankless water heater?
Check the wire connections on the gas valve and control board. Measure the voltage on the wires when a water heater is ON… it should be 24 VDC. If the measurement is as specified, the gas valve is malfunctioning. Find help to install or repair your Bosch tankless!
