Yes, but choose one based on amperage. See what your TV draws for nominal running current as the resistance of the thermister will be based on what percentage of its rated current is being used.
If the TV normally draws an amp, pick a 2A thermister. Running at half the current, the resistance will be an ohm or two.
If you pick one too high in current rating, the thermister will have a higher run resistance which may or may not be an issue.
Also, if it's not mounted in the board, make sure to get one with leads!
John