Hi,
I am having a problem with the timings and controls of my central heating system. Basically my boiler is only being controlled by the thermostat rather than being overridden by the timer/controls. I have tried to troubleshoot this fault myself but am unclear as to what the problem is.
I had some repairs carried out at the start of the year when the air pressure valve clogged up and stopped my boiler from working. Long story short i replaced the complete set of curcuit boards (as the originals were blown by an engineer troubleshooting the valve) and had an engineer replace the valve and check the system.
I am not sure if this caused the fault with the controls, but i have had the thermostat down low all summer obviously to not thave it come on when not needed. I have checked the circuit with a voltmeter to try and determine where the fault lies but am unable to as the circuit confuses me.
I have tested the "Controls" terminals on the boiler and it receives 200v whether the controls are on or off.
I have checked the controls mains feed and it receives 240v.
The controls connection to the boiler at the back of the controls doesn't have any voltage.
With the controls removed i have done a circuit test on the back with the two contacts and there is a curcuit whether the controls are on or off.
If i remember correctly if the controls are removed and the thermostat is on then it doesn't initiate the boiler.
Are there any further tests i can run to determine the fault or would it be best to get an engineer out, if so does anyone know a reliable engineer in the epsom/chessington area who may include it in their service costs?
Your help is greatly appreciated and anything else i can do and post to help i will gladly do.
Cheers.
I am having a problem with the timings and controls of my central heating system. Basically my boiler is only being controlled by the thermostat rather than being overridden by the timer/controls. I have tried to troubleshoot this fault myself but am unclear as to what the problem is.
I had some repairs carried out at the start of the year when the air pressure valve clogged up and stopped my boiler from working. Long story short i replaced the complete set of curcuit boards (as the originals were blown by an engineer troubleshooting the valve) and had an engineer replace the valve and check the system.
I am not sure if this caused the fault with the controls, but i have had the thermostat down low all summer obviously to not thave it come on when not needed. I have checked the circuit with a voltmeter to try and determine where the fault lies but am unable to as the circuit confuses me.
I have tested the "Controls" terminals on the boiler and it receives 200v whether the controls are on or off.
I have checked the controls mains feed and it receives 240v.
The controls connection to the boiler at the back of the controls doesn't have any voltage.
With the controls removed i have done a circuit test on the back with the two contacts and there is a curcuit whether the controls are on or off.
If i remember correctly if the controls are removed and the thermostat is on then it doesn't initiate the boiler.
Are there any further tests i can run to determine the fault or would it be best to get an engineer out, if so does anyone know a reliable engineer in the epsom/chessington area who may include it in their service costs?
Your help is greatly appreciated and anything else i can do and post to help i will gladly do.
Cheers.
