|Recently I stumbled upon a useful article on how you can fix your home gas
heaters after a flood. While for some people, floods are not a usual occurence, but unfortunately for
many flood proned countries, this is a big problem affecting many people's homes and lives and these tips could
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Recently, after a heavy rain and rather long power outage I came home to find my basement flooded. With the economy
being poor and my own economic situation precarious, I decided to try and fix my water heater and furnace myself. I
may write a similar article on the furnace at a later time.
- Obviously, after your power is restored, you need to get all water out of the basement. This is usually
done with a submersible pump. In my case the pumps started working after power was restored. 3 hours later the
basement was mostly free of water.
- When inspecting the damage remember to turn all gas shut-offs to the off position. This will prevent a leak
in the event a control valve is damaged by water.
- Gather tools. Every water heater is a bit different. In my case i got by with a small adjustable wrench,
channel locks, air compressor, blow gun, and rags.
- Disconnect gas supply line, pilot line, main burner line, and thermocouple from control. Thermocouples come
in both right and left thread. Be careful to turn yours in the right direction as overtightening can damage the
- Remove burner chamber cover bolts(if required). The burner assembly should now pull out of the
- Inspect the burner assembly for damage and corrosion. Replace the entire burner assembly if damaged.
Otherwise, clean the burner assembly with rags and blow out all orifices with air hose.
- Clean the burner chamber thoroughly and ensure that vent screen is free of debris.
- Replace the burner assembly in the burner chamber ensuring that locating features are aligned and clips are
replaced (if applicable). In my case i had to make certain a small 3/4 inch wide tang was inserted securely
into a slot. This hold the burner in the center of the chamber.
- Blow out all ports on the control unit until it is free of water.
- Reconnect the pilot line, burner line,and thermocouple. (Do Not Overtighten --- brass fittings strip
- Reconnect gas supply line.
- Check for gas leaks. Turn gas supply on at valve and spray leak detector on all fittings. If you do not
have leak detector use water and dish soap mixed at about 75% 25% respectively. Leaks will present by creating
bubbles around fittings.
- Fix any leaks found in step 12. Usually a good teflon tape sealant does the trick.
- Light the pilot according to manufacturer instructions. The gas water heater should be ready to go.
- Never service a gas appliance with gas line connected. Always disconnect gas lines before servicing. Clear
the work area of any possible ignition sources.
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