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Re: HEATER IS JUNKY
Sounds like you have a blockage to the main jet. If you have a
compressor just blow the jet out from the top and with a bit of luck it
will clear it. If not you may need to remove the outer covering and
find the pipe to the main jet and again using compressed air just blow
it out. Usually not much goes wrong with these apart from blockages
every now and then and most of the servicing places just blow them out
with compressed air. Just make sure if you remove a pipe you tighten
the pipe up properly when re-fitting it. Hope this helps.
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First locate where to light pilot. You can do this by following thin aluminum colored tubing from control valve to inside heater.In general on top of your gas control valve is a knob. Turn indicator of this knob to pilot and depress knob. This will start gas flow to pilot at end of thin tube. Hold this knob in the depressed position and light pilot. DO NOT release knob for 30 -45 seconds. Then release knob and pilot will remain lit. Then turn knob to on position. If pilot will not stay lit you may need a new thermo coupler, which senses heat from flame to keep pilot gas flow open.
Classic symptom of a malfunctioning thermocouple. When you press the knob, you force the gas valve open so gas will flow. The function of the thermocouple is to confirm that the pilot is lit and allow gas to continue to flow when you release the valve. A new thermocouple is not that expensive. Good luck!
Turn the Gas Control Knob inside the heater compartment from OFF to PILOT. Push in the knob and hold it, at the sametime push the ignitor button (will probably be a Red button). Once the pilot lights, continue to hold the Control Knob down for one minute. Then ease off of it. If the pilot stays lit, turn the Control Knob to the ON position. The burner should light, if the Thermostat is set higher than the ambient temperature in the house. If the Ignitor button doesn't work, you can match light the pilot. Just be careful and follow the instructions above, once it's lit.
The pilot assembly may be dirty (dust, lint, pet hair) or the Thermocouple has failed. The thermocouple is a safety feature that stops gas from coning out of the pilot, if the pilot suddenly goes out.
If you can disassemble the heater cabinet, you can access all of the inner workings. To clean the pilot assembly use canned compressed air with a straw nozzle (like you clean your computer with). Blow out the pilot tip and all down the pilot assembly. If you see a lot of dust inside the heater cabinet vacuum it out with a vacuum that has a hose and brush attachment. A crevice tool works well too.
After doing all of the above, reassemble the heater cabinet, and try lighting the pilot. Be sure the control knob is right in the pilot position, when you depress it to light the pilot. If it doesn't go all the way in and your don't feel strong pressure pushing back on it, it's not right in the pilot position. Turn it a hair one way and then the other, until you locate it exactly. Light the pilot as you normally would, hold the control knob in for one minute after it lights, then ease off of it slowly. In the Pilot stays lit, let it burn for a minute before turning it to the ON position. After that, you should be back in business.
If the pilot lights and fails to hold, the Thermocouple will need to be replaced.
You will first need to turn the control knob to pilot. Then depress the control knob button and hold it. Then press the push button piezo igniter several times until pilot lights or open pilot inspection cover and manually light pilot with match/lighter. You may need to hold the control knob for at least a minute. Then release the control knob and if the pilot stays lit then turn the control knob to on. If it does not light then repeat the process again.
Do you have the serial number or the manufacture date? There are some design changes and I would need to know the year of manufacture to assist accurately. Usually it is a relay or the thermocouple connection that will affect the unit staying lit.