Hello, we recently had the bathroom renovated in our 100+ year old house and had a new water baseboard heater installed. Yesterday we turned on the heat for the first time ever since moving in and since the renovation, and the bathroom heater is not working. The other original heaters on the third floor where the bathroom is located are working fine. I did some reading where it was suggested that one bleed the heater, however I see no valve anywhere on the new baseboard heater. I should also mention that I went to the second floor and tested the exposed pipe that feeds the bathroom radiator on the third floor, and it only warms up at the very bottom, the top is cold. Please help!