Easiest method of diagnosis is to remove / replace component one at a time until the problem is eliminated. In this case, turn off the breaker, remove the thermostat and connect the line and load wires together. Turn on the breaker and see if you get heat. Still no heat, then you have likely have a bad heater. Assuming the breaker is functioning properly. If there are other heaters on the came circuit you can assume it's not the breaker.
"John" wrote in message ...
My elec. baseboard unit is barely putting out any heat. The thermostat is original to the house 30 years ago. It is a Honeywell T498A All connections at the stat are tight and voltage coming in is OK. Has the thermostat has gone bad? What is the likely. Thanks for any input. problem? The thermostat is only about $24.00