Auxilary heat is a second source of heat when your primary source can not keep up on it's own (either electric or gas).
on my honeywell gas furnace says aux heat is on when heat is on
dont know the name brand of T-Stat that would say EH.. but that probably means Electric heat..on all honeywell heat pump T-Stat's it is EM-Heating means Emergency Heating.. its just the heat strip comming on automaticly or manual depending how your T-Stat is wired..
Hi, I had the same issues, I would gather to say it is the thermostat.
I would say Honeywell
I am going to say no. TH8320U1008 and YRTH8500D1024 look to be the same. If you notice the number of Stages that each controls, is what I am basing my guess on. TH8110 only controls 1 Heat/1 Cool. Both TH8320 and YRTH8500 control 2 Heat/2 Cool. Here are product links: http://customer.honeywell.com/honeywell/ProductInfo.aspx/TH8110U1003 http://customer.honeywell.com/honeywell/ProductInfo.aspx/TH8320U1008 http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?productId=100295793
If the main motor fails, the instructions say to turn on the auxiliary motor.
Honeywell was founded in 1906. They say 'Our mission is to create value for shareholders through control technology that saves energy, protects the environment, improves productivity, increases comfort and safety, and promotes peace.'
All that thermostat indication is saying is that the heat is supposed to be on. If you hear the fan running for a minute or so after the heat indicator has gone out this is normal as the fan is blowing out the remaining residual heat in the furnace after the flame has gone out. The same works in reverse once the stat indicates a call for heat the fan does not start for a minute or so to allow the furnace to heat up and not to blow cold air into the space at start up.
It sounds like the guage is working fine. Since you have little or no heat when you say the guage isn't working it sounds like the thermostat is getting stuck open causing your coolant to be constantly cooled (it isn't closing so the engine can warm up sufficiently to provide heat). Replace your thermostat and I bet your problem will go away.
If you have a heat pump A/C unit then you have auxillary heat and emergency heat. The EM stands for emergency heat, which is using only your electric heat strips or gas heat, depending on your system. The auxillary heat uses your compressor inside of your outside unit. Say the house is 60 degrees inside and you set your stat to 70, the temperature difference is so great that if the heat pump alone cannot satisfy, then the auxillary heat would come on to assist the heat pump. Say you were to get a leak in either your condenser or evaporator coils, your heat pump would not work on the regular heat setting on the tstat. In this circumstance you would want to use just the emergency heat until a service tech can evaluate the system.
* Where is the best location a thermostat in the home should be? * ---- * Don't place the thermostat on an exterior wall. * Don't place the thermostat near an intake duct.* Don't place the thermostat near the heat register * Do place the thermostat on an interior wall a bought half way point about * 4.5 ' to 5', on the wall away from any breezes or heat admitting devices.