Question about Williams 2509612 Ceramic Mid-Size Heater

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Burner won't turn on

Pilot is lit, power and thermostat are fine. We jumped the wires and still it would not start.

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The filter inside the inlet valve is probably clogged and needs replaced.

Posted on Feb 20, 2009

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Raypak problem, Pilot is lit, can jump TH to TH to lite, goes out when jumper is removed.


check how many millivolts the pilot is generating. if pilot stay lit and burners wont fire u have a problem with one of the safties, lose wire connection, tstat control

May 28, 2013 | Raypak Pool & Spa

1 Answer

Pilot will lite but burner will not when you go from pilot to on


Hi.

When this happens it usually means that one of the coils is defective. The burner valve is operated by three or two coils. If one of the coils is bad the pilot will lit but the valve won't stay open when the oven is supposed to turn on.

Test the coils reading impedance at their contacts. If a coil is open (shows Ohms infinity at the multimeter reading), then the coil must be replaced.

If the coils are fine test the thermostats (always reading impedance) and replace the coils if thermostats are fine. Check also pressure regulator and ensure that the flame is OK.

Other part that could cause the problem is the flame sensor. The flame sensor is difficult to test and fails really uncommonly. The sensor works in parallel with the coils. The part is tested reading Volts. Flame sensor is usually tested and replaced only when there is no other possible cause for the problem, after testing coils and thermostats and eventually replacing coils.

Regards.

Ginko
I

Jul 20, 2011 | Kitchen Ranges

1 Answer

I can light the pilot and the burner will come on, but it won't stay lit. I bought a new pilot assembly and installed it. the burner and the pilot light still won't stay lit. This is the unit that...


Most gas water heater problems can be solved by having service technician perform yearly maintenance. Or by doing maintenance yourself.
This maintenance includes cleaning burner parts and combustion chamber, checking gas pressure and supply, bleeding air out of gas line, checking vent draft, making sure air supply is adequate and not exposed to chemicals, cleaning air intake. Also adjusting flame sensor so it is positioned correctly. If water heater is connected to electric circuit, the outlet must have correct polarity.

You can get gas to appliance indicates the gas control valve and water heater are not locked out. But the gas control valve thermostat can still be bad.

Open following link for illustrations, typical service manuals, and maintenance information, and images of gas control valve thermostats.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Jul 20, 2011 | Reliance & Pilot Assembly for Natural Gas...

1 Answer

Pilot will light but main burner will not light


if burner lights after jumping valve you have something wrong in thermostat loop. disconnect the 2 thermostat wires on gas valve and use multimeter on continuity setting. if all wires ,connectors and components are good,you will get a tone.since you have jumped out each component in thermostat loop with no success ,i would suspect a bad wire or oxidation on a terminal .

Sep 24, 2009 | Teledyne Laars Laars Lite 2 Pool Heater...

3 Answers

Pilot is lit but the heater won't fire up


A few things dictate when the main burner turns on. One is a thermocouple not getting hot enough, the other is a bad thermostat ot thermostat wire, and another is the gas valve. First look at the gas valve located on the heater and make sure it is in the On position and not in the Pilot position. Remove your thermostat and jump the two wires together. The heater should light. If not, go back to the gas valve and find the wires up to the thermostat, the should be attached to terminals marked TH and MV or something similar. Jump the terminals. The heater should start. If not, you may need to replace the thermocouple.

Sep 04, 2009 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Pilot lit clicking noise no burner


make sure knob on gas valve(inside heater)is turned to on position.3/4" should be fine as long as heater is not larger than than 175,000 btu

Jul 14, 2009 | Jandy Lite 2 Natural Gas Pilot Light...

1 Answer

Heat will not come on. I think thermostat is fine and the pilot is lit on the unit. what else could i check?


You can check if the thermostat is working or not by removing the thermostat from its base and placing a jumper wire from the red wire to the white wire. If the furnace burner lights then you have a thermostat problem.

Dec 14, 2008 | Heating & Cooling

1 Answer

Fryer IFS 40. Burner not getting on.


If the pilot light stays lit then there is no problem with the thermocouple. What you have is a problem with the thermostat or the gas valve operator. try jumping the thermostat wires and see if the gas comes on. If so simply replace the thermostat.

Dec 14, 2008 | Imperial IFS40 Deep Fryer

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