Why does my water heater smell like chemicals?

This smell is typically caused by sulfate bacteria that can develop within the tank. This issue usually happens when warm water is left too long in the tank and bacteria builds up in the water. This problem can also happen if you have well water and are not treating the water with chlorine in the well.

Is it normal for a new water heater to smell?





Re: Smell from Hot Water – New Tank
It’s generally harmless, although annoying. One way to fix that is to turn the water heater temperature to maximum for a short amount of time. This can kill off the bacteria and clean the tank. You have to be careful though and not run it too long, as it can damage the tank.

Can a tankless water heater smell?

An Unusual Smell Near Your Tankless Water Heater
It could turn the water brown or rust-colored. If you notice a stale, musty, or rotting smell near your water heater, it might have a leak. This is rare for tankless water heaters, but they can leak occasionally.

Do tankless water heaters emit gas smell?

Natural and propane gas is naturally odorless. If this occurs, your tankless water heater will start beeping and produce an error code. This is the main reason gas suppliers started adding a gas called mercaptan to the gas supply to create a “rotten egg” smell.

Why does my hot water heater smell like burning plastic?

Faulty Wiring
If your water heater is suffering from such an issue, you may notice the smell of a burning wire. If the wire’s insulation begins to melt, it might smell like burning plastic. This kind of water heater malfunction will usually come on all of a sudden.

Why does my water heater smell weird?





The most common cause of a bad smell in your water heater is an overgrowth of bacteria which can cause a sulfur or rotten egg smell. These bacteria can survive in your hot water tank without oxygen, and react with sulfur and the magnesium in the sacrificial anode rod to produce smelly hydrogen sulfide gas.

Why does my water heater smell like sulfur?

Problem #1: High SRB count in water supply
Sulfur-reducing bacteria (SRB) get energy by feeding off of sulfates, eventually reducing them to hydrogen sulfide. If your home’s water supply has a high SRB count, that could explain why you’re getting whiffs of that rotten egg smell.

How do I get the sulfur smell out of my hot water heater?

How to Get Rid of Rotten Egg Smell in Water

  1. Flushing Your Tank Out. …
  2. Using Chlorine. …
  3. Replacing Your Anode Rod. …
  4. Installing a Water Softening System. …
  5. Replacing Your Water Heater.

Why does my hot water smell like Sulphur?



Both hot and cold water smells like sulfur: If the odor is present in both your hot and cold water, the most common cause is the presence of hydrogen sulfide in your water supply. Essentially, sulfur bacteria create hydrogen sulfide gas as a result of feeding on sulfates in the water.

Are tankless water heaters toxic?

Aside from the concern about carbon monoxide, a tankless water heater is a very safe piece of equipment. Because there is no tank which can overheat or experience a massive spike in pressure, a tankless system doesn’t have the danger of bursting or exploding.

How do I get rid of the smell in my tankless water heater?

If the cold water does not contain odors, but the hot water smells bad, then a thorough sanitizing of the water heater tank with 1 to 2 pints of store-bought hydrogen peroxide will eliminate the odor and smell from the water heater.

Does a tankless water heater vent gas?



Propane tankless water heaters don’t have to use indoor air for combustion. Tankless water heaters can be vented in two ways: power-vent or direct-vent.

Why do new heaters smell?

Burning Smell
Scary though it may seem, a burning smell is quite common when you first start up your furnace in the fall. The odour is usually caused by several months’ worth of dust. Normally this dust burns off harmlessly within a few hours.

Why does my heater smell like its burning?

A burning smell when you first turn your heater on is most likely caused by dust buildup on your furnace. For homeowners who live in a region that often experiences changing seasons, like in the Mid-Atlantic, it’s likely that the furnace isn’t used all year round.

What does formaldehyde smell like?

Formaldehyde is a colorless chemical with a strong pickle-like odor that is commonly used in many manufacturing processes. It easily becomes a gas at room temperature, which makes it part of a larger group of chemicals known as volatile organic compounds (VOCs).

Why does it smell like burning plastic in my house?



If your house smells of burning plastic, take caution. The smell of burning plastic could be a sign of an overheated household appliance, a kitchen accident, or a problem with the HVAC system. Heaters and furnaces may smell of burnt plastic when their parts are broken or worn out.

What does electrical burning smell like?

An electrical fire initially has a fairly acrid smell of plastic burning. The short could be in the outlet or in the wiring inside a wall and can be hard to locate.

Why does it smell like chemicals in my house?

Chemical Smells
If this part becomes cracked or damaged, it can release dangerous carbon monoxide fumes into the air that can circulate through your HVAC ductwork and out into the air in your home. This can result in a chemical smell throughout your home.

Why do I keep smell electrical burning?

Brief episodes of phantom smells or phantosmia — smelling something that’s not there — can be triggered by temporal lobe seizures, epilepsy, or head trauma. Phantosmia is also associated with Alzheimer’s and occasionally with the onset of a migraine.