50084420-002. Pilot lights but why doesn't status light turn on?

1 flash every 3 seconds means the pilot is lit and the gas valve is working normally. A solid red status light means the water heater is shutting down. Turn the gas control valve OFF and wait 10 minutes before attempting to relight the pilot

www.reliancewaterheaters.com/media/8986/gas-lighting-instructions.pdf

This problem is caused by a defective gas supply valve.

Hi pilot ligh lit fitted new thermal cupling gas pilot lights hold down switch for over 2 / 3 minutes butgas pilot goes out

Most gas ovens that aren't electronic ignition usually have a pilot light.
Usually one in the oven area and one for each burner. (Sometimes shared between two burners.)
These pilot lights must lit at all times...otherwise it won't light up and you'll smell gas.
Usually the pilot light is in the very back of the oven and can be seen with the broiler drawer opened.

There is a small set screw located at the pilot light assembly in the oven and also at every burner.
This allows you to adjust pilot light up or down, thereby letting you set pilot light flame to a level that doesn't get blown out by a draft...or you can turn it off completely.

If you use that set screw to turn off the pilot light gas, you'd need to strike a match to light the oven or burners everytime you needed them.

If your pilot light is lit, then you do have some gas flow, so it is probably the thermocoupler (the part heated by the pilot light) that is not telling the gas valve to open the main line. Sometimes it is just a case of residue on the thermocoupler that is not letting it get up to temperature and sometimes it has been knocked out of alignment and the pilot light is not putting direct heat on it.

A cleaning with steel wool (don't overdo it) would take care of the residue, and you can GENTLY move the thermocoupler back over the pilot flame. If neither of that helps then replace the thermocoupler.

Most likely culprit is the igniter.
When you turn the oven on it opens a gas valve allowing a small amount of gas to flow thru the pilot light. The igniter then lights the pilot and when the sensor determines the pilot is lit it opens th emain gas valve and the oven lights. If the igniter fails and doesn't light the pilot the sensor doesn't heat up and it shuts down the pilot and nothing works.
The igniter is usually accessable under the oven by removing the drawer. It has a single wire attached and looks like a short cigarette made of ceramic witha metal tip.
You didn't provide model number so I can't give you part number but if you look it up here you may be able to get one from Sears
http://www.searspartsdirect.com/partsdirect/index.action?sid=PSHx20080114x00001

If they go off then do not worry, the abs system has several things to check before it can give a systems good status(no light on).If the light is not on all the time you should be fine.It comes on when engine is cranked to let you know it is running a diagnostic.If the system finds a fault it will turn the light on.

Button must be held down for about a minute after lighting pilot, if it still doesn`t stay light sounds like the thermocouple is bad. Looks like a skinny copper wire runs from the pilot light valve to pilot light flame, can be purchased at any hardware store for $5 or $10.

possibly a fowled thermocouple if the thermocouple doesn's sense the pilot flame then it will not send a signal to the gas valve telling it that its okay to open cause the pilot is lit.

THE flame from the pilot should shoot past the thermo-couple and heat this up and make a small amount of mili- amps to prove the pilot light is lit. ..So if the flame doesn,t go past the thermo-couple it won, make mili-amps or its tme to change out the thermo-couple, They only cost lest than $8:00 and you can change it!