Furnace not turning on and thermostat has arrows pointing to system on and temporary. Why won't it heat?

SOURCE: re: furnace keeps running, no heat

sounds like the high limits tripped

SOURCE: Ruud achiever 90 plus won`t start at times

sounds like you have a heat pump heat pumps dont work below 30* temps you should have some type of backup heat

SOURCE: ruud achiever 90 plus won`t start

Check the data information on the unit there should be a troubleshooting guide that tells you what the two lights blinking once means. hope this helps.good luck. normally found with schematic

SOURCE: Trouble Installing Hunter Brand Thermostat

on the back of the packaging for the HUNTER MODEL 44155C it states that it is not compatible with heat pumps

SOURCE: heat pump works in emergency heat, but not in auxiliary heat

I set the thermostat for 70 degrees. It comes on always in auxillary heat and does not shut off when it reaches 70 degrees. It is a heat pump, I am assuming, it might be the thermostat? But when the air conditioner is on, it turns off when it reaches it's temperature.