Treato found 16 discussions about Cold Symptoms and Cats Allergy on the web.
Best Answer: When the toilet is flushed, the toilet is robbing pressure from the shower, which is usually close to the toilet. As the COLD water pressure goes down from the toilet flush, the HOT water pressure is higher, therefore the water gets hotter as the COLD pressure goes down.
If the water in the shower never gets hot, the problem may be with the temperature control on the water heater. If you have an electric water heater, one of the elements may have burned out and the water either gets hot for only a short length of time, or it never gets hot at all.etermine if the problem is whole-house related or just affecting the shower. Turn on every hot water faucet and check the temperature of the hot water. If they all start out hot but cool quickly, a burner in the water heater may be the cause. If they never get hot, a faulty dip tube may be the problem.