how do i fix the thermo coupling on my patio heater?

Thermocouples are cheap and easy to replace, try patioheaters4u.com web site, they have loads of help pages and stock generic spare parts for patio heaters

Harry
January 2010

Need a bit more detail on how it's broken really.

Does it not light at all (No spark from the ignition)?
If so then it's the ignition refered to by peccavi above.

If it lights, but goes out when you try to turn it up to full, then it's very likely the thermocouple.

This is quite a handy page http://patioheaters4u.com/PatioHeaterTopRepairTips.htm

Greg.

Greg
November 2009

You can buy a replacement piezo ignitor here... £9.89

http://www.patioheaters4u.com/PatioHeaterPiezoIgnitor.htm

P
September 2009

A Thermocouple is a simple heat sensor - two metals joined together produce an electrical voltage dependant on heat to provide a control signal. It's doubtful that your patio heater has a thermocouple.

You may have a piezoelectric ignition device - a spring loaded hammer strikes a quartz crystal when a button is pressed - a high voltage is produced and the spark from it lights the gas.

You can sometimes mend them (or use a regular gas or cooker lighter).

The second page of this link shows the inner workings of a piezo spark machine...

http://www.gswagner.com/piezo/piezo.html

Good luck...

Peccavi
September 2009