This would indicate that the system is low on coolant when the gauge is hot. Not enough coolant to service the heater core.
Over heating and no heat from the heater.
Not sure what you mean exactly....but a thermostat triggers your heating/cooling system on and off, thereby maintaining whatever temperature to which you have it set.
Sounds like your cooling system is full of air. Make sure you have it bled off properly. You could also have a blown headgasket, or have a DEX cool blockage in the system. Either way, it sounds like you need to take it to a shop and have it properly diagnosed.
have your radiator cleaned and replace your thermostate, clogged radiators and sticky thermostats can cause your engine to overheat under load.
Electricity for lighting, cooking, heating, appliances; oil for transport; natural gas for domestic heating
Your heating coils are most likely clogged.
glass blowing
Lighting, heating, cooking, washing, transport, industry.
One reason your home electric heater is blowing cold air is the heating elements are burned out. A bad thermostat may also be the problem.
A timer is often used in a heated rear window function to stop the circuit from over heating and blowing a fuse if forgotton about.
if you have already replaced the thermostat ,try replacing the heating core . it's located under the passanger side dash . There are a number of other things to investigate before going to the major under-taking of the heater core. See "Related Questions" below for a comprehensive trouble-shooting guide to Taurus/Sable heating problems.
check the fan clutch