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Re: cozy wall heater does not turn on
Hi, I will walk you through to check the stat. Pull off the cover 1st. You will need a screwdriver, a small one. Could be slotted or phillips. Loosen all of the screws you can see until the t-stat comes off. You have 3 sections counting cover. You will now see the sub-base and wires. You should have only 2 wires to the stat. You will need a piece of scrap insulated wire, even a piece of old speaker wire twisted togeter at each end will work. No worry of shock. Just jump or touch across the 2 terminals and hold them on and if it fires up and comes on, the thermostat is the fault. More then likely that will be the problem. Any hardware store will have one. Get a heat milivolt only, even if the salesman trys to sale you a heat/cool 24 volt stat which will work, but will cause problems in the future. I am sure it is stat. If not, contact me and I will walk you through what else would cause this. If the pilot is on, there is no ignitor on this furnace, either a thermopile generator or a thermocouple, a high limit switch and the main gas valve. Keep me posted, it will only take you a few minutes to test the t-stat. Let me know. Shastalaker7
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There are two types of igniters, spark-type or glow heater. The glow heaters wear out and crack or break and the spark-type spark gap gets fouled or dirty. Both could have electronics problems that drive the glow heater or spark systems. The Filtrete thermostat is not the issue. While rapping the unit makes the glow igniter come back together to glow again.
This can be caused by low pilot flame height (Clean the pilot orifice or increase the pilot gas flow if necessary, by adjusting at combination control valve). Or the burner ports near the pilot flame are clogged and need cleaning. But, don't enlarge the holes. Low gas pressure can also cause this, but your repair person already ruled this out. If you have a wall thermostat, the Thermopile or Pilot Generator (it's the same thing) may be weak and failing. It's not generating enough millivolts of electricity to open the gas valve, when the thermostat is turned up. Or the Pilot Flame is not always touching it. If it is the Pilot Generator, the Cozy Part # is 70098 and cost around $40.00. A talented service man can install it easily.
Generally, these are the first things that you troubleshoot for delayed ignition. Hope this helped to get you started.
could have a faulty gas valve which may let in to much gas.extra load from the stove may be correcting this.
to much gas /too rich a mixture can affect internal temperatures causing thermostats to fail.
does the stove burn a nice strong bright blue flame?.
If the unit has a wall thermostat, remove one of the wires from the thermostat. If the unit stops it indicates a bad thermostat. If it continues to heat, remove one of the wires coming from the thermostat going to the gas valve inside the heater. If it continues to heat you have a bad gas valve. If the heater shuts off, you have a bad thermostat wire (short).
It could be one of two things. Either you have a weak gas valve or dirty burners. Either way you will need to get a technician out to check it in order to know for sure. Or if you have access to high air pressure you can try to clean your burners and see if that eleviates the problem. But you saod it has done it since new. I am leaning towards a weak/ or stuck diaphram in the gas valve.
On top of the gas valve you will see a knob. Turn the knob to the position that says pilot. It's on the side of valve. Press the knob down with one hand and take your long lighter stick it by the pilot tube looks like a small aluminum tube should light pretty quickly hold for 30 seconds release the button you have been holding down. Now turn the knob to the on position. Make sure the thermostat is turned off so the flame don't fire up as soon as you turn knob. If you are uncomfortable gas your gas company and they should come out for free.