The question to you is ....... with the 'new' relay channel being used..... is it very much cooler than the previous channel used? In other words...... not as hot?
Works excellent is one thing. The big question is .... with the new channel being used .... is it much cooler when compared with the 'other' channel that was used before?
Can't discount the possibility that the channel you used (originally) may have failed due to some kind of manufacturing defect. Hard to say right now. That's why you got to focus on the temperature of this new channel. If it stays much cooler than the other one.... then it might be good news.