County de Yeoman 1764 € & 2460 €

We acquired the house with a Yeoman County to primarily heat the water for the heating system, covering 4 rather small radiators. The previous owner bought and had installed the system in 2012 or 2013 and did not pay much attention to some maintenance. They did not use the system during the years. 2019-2021, presumably because the water pump and thermostat were no longer functioning and the chimney was not up to standard. We had all of this repaired and we are now using the system on a daily basis. Unfortunately we cannot keep the stove burning throughout the night, which could endanger the radiators when it gets really cold. We aim to get more maintenance by renewing the cords and installing a regulator in the smokestack. We currently have a problem with the knob of the right door. The fixation of the knob got out and we had to try little nails and very thin screws to fix the knob to the closing handle of the door, but it keeps falling out resulting in cumbersome handling of the door and poor burning results due to unwanted air coming in. Now this knob is broken and no longer usable. Could I order a new knob and the normal fixations with you ? If so, could you please write me a mail with the data needed for such an order ? I would greatly appreciate to receive your answer as soon as possible. With kindest reagards, Eddy Janvier, 7 Bourneix, 87500 Le Chalard, France