Details

Pictures

Removing the Heater Assembly 

• Remove front grill by moving side to side to dis-engage side clips. Bend out and pry out bottom section.

• Remove battery

• remove knob and black screws from control area.

• remove top screw and remove from unit

Heater Assembly (Not exact)

The above burner has a separate gas line which runs to the thermocouple and main burner which would work better then what I have.

Thermocouple

https://www.amazon.ca/Aupoko-Thermocouple-Replacement-Connection-Terminal/dp/B07MCLD6TX/ref=sr_1_7?crid=1TLY7PVX82MXT&dchild=1&keywords=patio+heater+thermocouple&qid=1624977896&sprefix=patio+heater+thermo%2Caps%2C167&sr=8-7

Should Flames Touch Thermocouples?

Yes, the pilot flame touches thermocouples at a certain level. If flames are weak and blue they hardly reach thermocouples, therefore, they should be strengthened. If flames extend past thermocouples, they are stronger. The perfect position is when flames cover the tops of thermocouples and burn with yellow-tips.

How Do You Test Patio Heater Thermocouples?

What you’ll need for the test :

• Multimeter
• Wrench
• Flame source, i.e., lighter or candle

The open-circuit test is quite a straightforward process, but it is best to look for a professional if you lack experience.

• Make sure to turn off your gas flow before conducting the test since you’ll have to remove the thermocouple.
• To remove the patio heater thermocouple, unscrew the connection nuts, and copper leads, followed by the bracket nuts.
• Set your meter to ohms. Touch the two leads of the meter. Your reading should be zero. If so, turn your meter back to volts.
• Turn the flame source on to conduct the actual test.
• Heat the thermocouple to a considerable level by placing it in the flame.
• Attach the leads of your multimeter to your thermocouple. Place one lead on one of its sides. Attach the next lead to the end at the flame position.
• For thermocouples working correctly, your reading should range between 25-30 milli volts. If you’re reading it below 25 milli volts, you should purchase a new model.

Issues

Fix

Since my burner doesn't have a separate pilot light gas line like the above, it is crucial that the thermocouple is positioned just right! We want to the thermocouple to be in an area far enough from the burner to still get flame when on high. 

The fix here was to move the themocouple bracket closer to the burner and angle it up at a bit of an angle.

References