I've got an all-pro patio heater, SPC-54PHB, that I have trouble with every fall. In the past I have used canned air to clean the area around the pilot and the heater would start working. This year I've done all of my usual stuff but the heater still does not work. I have used matches and I can hear the gas light for just a second and then go out. Do you have any suggestions as to how I can get my heater up and running? Thanks

Here is a direct link to the model SPC-K75 at Allparts Equipments website.

http://www.allpartsinc.com/mmALLPARTS_NEW/Others/000228-01.pdf

Yes, I do. Master Distributors stocks parts for All Pro heaters. http://www.masterparts.net/

Yes, I would say, it's possible. Try emptying the tank and see if you hear any ratting inside the tank, when you shake it. Once the pressure is off the tank, any debris may fall back into the tank.

You may also want to check the fuel filter for dirt and debris, as well as the air intake filter.
Also, there may be air in the lines.

In checking the Owners Manual for your model heater, there's not much there, as far as Trouble Shooting is concerned. Never the less, I am providing a link to it, You can download and print it for future reference, if you so desire.

http://www.desatech.com/manuals/Construction%20Heaters/000228-01.pdf

I hope this gets you started in the right direction.

These are two of the most common issues that cause the problem you're having.

If it's been used in a dirty or dusty environment, it may simply need a thorough cleaning. In addition, the propane tank may not have adequate gas to maintain combustion.

For more detailed information on Trouble Shooting your heater go to the following link. You can download and print it for future reference.

http://www.desatech.com/manuals/Construction%20Heaters/113893-01.pdf

All of this should get you headed in the right direction to solve the problem.

Rich

these units have to be used in open area, with air flowing, they produce carbon monoxide...

you are on the right track. Disconnect the hose and check just the heater itself for obstructions. There should be an orfice that can be cleaned with a small needle. If this doesnt work, go to the pressure regulator and take off the cap. It will expose a screw for the adjustment on the gas pressure. Cw will increase the pressure and ccw will decrease the pressure. you have almost no adjustment on the primary air that is mixed with the gas so make sure you operate in a well ventilated area and watch for excessive black smoke. this is a sign of incomplete combustion of the gas and can be very dangerous

Did you clean the flame sensor probe? Take a piece of sandpaper or metal file and clean it. Try that.

I plug a Thermostat in The power line to break the power when at temp. Once I start the heater using the reset button,when temp is reached and the themo calls for heat just the blower comes on only. I have a All Pro propane 50,000 to 85,000 btu heater thanks Ron

One of two things, you need to clean it but it may only that the tank at the end and soon need to be replaced ort refill… check and see if anyone played with the pressure regulator.
Please let me know how this worked for you and please do not forget to grade my assistance so I am able to continue to provide you with better service. I will be working with you to conclusion of the issues.

going through the backplate to the nozzle location is the thermocouple. it is a copper like tube that sits back from the actual flame. if you are looking for a replacement go to www dot desatech dot com.