It's been very hot (over 90) and humid the past week or so, but otherwise nothing has changed in my home. I don't want to replace them unless there is nothing else we can do. They are over 14 years old.
Just to be sure if you are speaking about the red LED (indicator) they are generic. If you mean the clear or grey device you have an emitter on one side and a receiver on the other. These quit rarely. If you want to test infrared emitters easily buy a $13 detector from MCM Electronics. It is a card with a spot that glows in the presence of infrared radiation from most emitters, including TV remotes and door safety sensors. I have not replaced one because it is easier to replace the device and due to liability insurance demands. Does the opener still work and if it does do you hold the wall button constantly to close the door? If it is just the red indicator LED remember diodes are polarized. Have fun.
I agree with Rich Z for one very basic reason. IF It's a surface in a kitchen that comes in contact with food products; it shouldn't be used. Certainly one can use a cutting board for food prep, but Epoxys and/or Poly's are not usual substances for counter tops. On a Bar or some such; it's acceptable, and as Rich says there are various formulations; that offer different consistencies and set/cure times. Epoxy might also need a catalyst; like Fiber Glass Resin does.Another issue will be smell/fumes/possible toxicity/ Lots of ventilation/ and no open flames while working with it or as it sets/cures. Another reason would be possible damage to the top. Steven Wolf
PEX (cross-linked polyethylene) is the modern stuff that is much better than the previous plastics that were attempted. I recently had to replace all my polybutylene pipes with PEX after two water leaks in the attic. It's available at most home improvement and plumbing stores. There are also fittings that join PEX and copper with no tools, Shark Bite is the popular brand at Home Depot. So far, they have a great reputation and I use them often myself. They are banned in two states, though that is probably because of politics and nothing to do with performance. As for your hot water to the master bath, is it affecting all faucets? I have also seen where the smaller hot water passages in mixer valves get clogged with undissolved material from the water heater. Sometimes a new mixer cartridge fixes the problem. You can blow through the cartridge after removal from faucet to test it.
