What can i do if i have tooth heat sensitivity, don't want a root canal?

Not much: Just because it is sense to heat does not mean you need root canal but if it is hurting a lot or starts to hurt from other things or radomly with out any stimulation then you do need a root canal or you may have to have it removed.

Root canal: Heat sensitivity is a sign of inflamed nerve tissue within the tooth. Only long term solution can be root canal. Temp. Solution is take motrinib over the counter.

Nothing Predictable: Hot sensitivity (opposed to cold) is normally a sign of an advancing infection within a tooth. This can only be treated by root canal therapy or tooth removal. Sometimes, such teeth are split and can't be fixed. In rare cases, it could simply be a cavity, or gum recession, but only your dentist can see the difference. 99% of the time you'll need the root canal if you want to save the tooth.

Get examined: Heat is often a sign of an irreversible pulpitis. Root canal therapy may be imminent if you decide to maintain the tooth. Have the tooth examined for caries and/or a existing failing restoration.