If these are old style hot water radiators (the tall cast iron type) they probably are air-locked and need to be bled. There is a valve at one end near the bottom to do this. Open this valve slowly and with caution since it will initially release trapped air (under pressure) and then very hot water. Close the valve when it stops sputtering from trapped air.
If they are electric radiators, they might be burned out or have bad electrical connections. You will need an electrician to correct this problem.
A person can tell if their home heat pump thermostat is working by setting the temperature a few degrees above or below ambient to see if it kicks on. A thermometer can be used to verify the temperature.
Yes
They transfer heat by the radiation
Usually there is a valve that you can open to let the air out .
Oil-filled radiators can be found in different stores. Some places include Amazon, Home Depot, Target, or even at Sears. They come in different colors.
Radiators are made of a lot of metals with high melting points (example: Aluminum)
take them off, then get a cloth and clean it. And you can hoover it up a little.
Why not try Antique Plumbing and Radiators? Stocking over 4500 cast iron radiators, you're sure to find the perfect one for your bathroom. All radiators are pressure tested and come with a one year guarantee from date of purchase.
If you are looking for a programmable thermostat for your home, try Askarepairtech.com. They have good pricing.
rite temp thermostat model # 8030
70
a thermostat