Heater not working on gas

[jennifer_374227268]

Hi, been checking the caravan over before we head of for easter, we can not get the heater to work on gas, it works great on electric. All valves are open but there isn't even a smell of gas coming from it. All other appliances are working ok on gas. Is there a simple explanation or does this require a gas fitter.

Thanks Jenny

 

[Martin_E]

Jennifer,

Gis a clue, what heater is it?

Don't forget it can take some time to get gas to purge to the heater or fridge, so will take a few goes to light them, could be as many as 10 to 20 goes.

 

[jennifer_374227268]

Hi Martin,

Sorry should have said, its a truma heater.

Tried that still not working.

 

[Sproket]

Have you changed the batteries on the automatic ignitor ?

Try a new battery & see if that works ? i ended up having to get a new ignitor....

Diagram

 

[Damian]

If you can smell gas inside the van from the fire you really do have problems !

It is room sealed. so no smell should be evident.

Most likely cause is as has been said, flat AA battery in igniter box.

If when you turn the fire to 1 or 2 you should instantly hear a ticking from the base of the fire, if you cannot, the battery is dead.

 

[jennifer_374227268]

Thanks for replies,

we thought it might be ignitor, so put new battery in still nothing not even a clicking noise. It must be what sproket said need new ignitor.

 

[ProfJohnL]

Hello Jennifer,

There are several other possibilities which include;

A micro switch built into the gas valve assembly controls the ignitor. If the switch has failed open circuit, the ignitor will not fire.

Another possible fault is with the ignition electrode inside the heater. The ignitor recognises when a flame is burning and shuts down the ignitor. It does this by looking for a small current path between the spark electrode and the burner bar. If the ceramic sleeve of the electrode is damaged, it can mimic a flame and prevent the ignitor from running

If it is either of the above faults, the heater should be repaired by a competent fitter.

 

[Damian]

Jennifer, as you now know where the battery for the ignition is, you can test the unit to see if it is actually faulty or if it is the microswitch at fault.

On the battery box are two wires coming from the gas valve (black and brown) disconnect them from the battery box and using a pair of insulated pliers bridge between the two pins in the socket where the plug has just been removed.

If you now get clicking, the microswitch is faulty and you need a Truma trained engineer to fix it.