The heater won't start.

This unit is equipped with an interrupt circuit. The reset is
integrated into the "On/Off" switch. If the unit does not
start, toggle the switch to "Off", wait 5 min. and toggle
the switch to "On"

Also here is a link to the manual from www.allpartsinc.com

http://www.allpartsinc.com/mmALLPARTS_NEW/Others/70202REVA.pdf

Tilt switch failure is a strong possibility. They can be finicky

Your pressure switch may not be activating (ie closing and making contacts) This means you could have a blocked flue, clogged pressure switch tube or a bad pressure switch. The pressure switch is a safety feature to ensure your exhaust is not blocked and operating correctly. Find owners manual. Look at trouble shooting section. Open cabinet and look for error code light. If blinking 3 times, try "jumping" the pressure switch. To jump pressure switch you need to clear code be turning off power. When the unit/thermostat calls for heat the power vent fan starts first, this is when you need to jump the pressure switch. You need to do this in sequence. That is the unit first starts the power vent exhaust thus activating the pressure switch allowing the ignition cycle to the burners and heat. So the power vent fan needs to start first BEFORE you put the jumper on to bypass the pressure switch. Once the jumper is on it will call for ignition after approx 30 seconds. If ignites your problem is one of the 3 stated at the opening of this paragraph

If the switch is easy to access, you could simply replace it -- but finding the switch may be nearly impossible, because of the type of unit you are talking about. Also, some of these oil gel heaters have the electronics encased in a non-acessable area, meaning if one component goes bad, the unit is basically done. Your best bet to find the switch is to start with the manufactures website. if there are no diagrams or repair manuals, you should be able to find some contact information about repairs

No not a fuse, maybe the transformer or high limit switch. This could be a couple different things. First we need to make sure that there is not a short. The unit should be taken a part to make sure that there are no shorts.

As long as the burner works it is unlikly that the thermostat is your problem. It is more likly the fan limit switch needs replaced.Unfortunatly I am having no luck finding a wiring diagram for this model so I can't tell you where it is at,but I think that's the problem. Thank you. Sorry I'm not more help

You may very well be right because if the induced draft motor won't come on then the heatin cycle stops there. It makes me wonder about the board because of it doing the same thing even if it's not calling for heat. Thanks.

Usually when the furnace blower motor runs all the time
The limit switch or rollout switch is usually open or bad.
The furnace board is seeing that one of those switches is open, so it brings the blower on to try to get the heat out of the combustion chamber area, so the switch will close. But if the switch is bad and won’t close, the furnace board will keep the blower running continuously.

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.

In the same temperature range that is giving you trouble, run an ext cord (110v) from a known good household circuit and plug the heater into the cord. If the heater runs OK, then the inverter is your problem.