A hot water heater can produce a rotten egg odor when it is turned on. To determine if the odor is from the hot water heater, go the a sink closest to the water heater and fill a glass with water from the hot water faucet and a second glass from the cold water faucet and smell them.
Typical costs: 1  A cable modem costs $40-$90. For example, Circuit City, an online-only retailer, sells the standalone Motorola SURFboard SB5105 cable modem for $60. 2  Some cable modems are combination devices with routers, which create a wireless network. These devices cost $80-$200. The more expensive units allow for faster rates of transfer. Amazon, for example, sells the Motorola SURFboard SBG900 DOCSIS 2.0 cable modem and router combo for $120.
If youâre renting a cable modem from Comcast, youâre probably wasting your money. Early in January, Comcast raised the cost of renting cable modems to $10 per month from $8 per month.This difference may seem small, but depending on how long you rent your modem, the difference could end up preventing you from having extra cash to spend at Starbucks.arly in January, Comcast raised the cost of renting cable modems to $10 per month from $8 per month. This difference may seem small, but depending on how long you rent your modem, the difference could end up preventing you from having extra cash to spend at Starbucks.