There are a lot but some of them are * Fan * Coils * hot water piping * chilled water or refrigerant piping * Pumps * Distribution system(ductwork)
HVAC unit is basically combination of HVAC chiller and all related equipment. See below related link for all details
You can go to www.hvacpartsoutlet.com and purchase any HVAC part you wish. I have always trusted HVAC to supply me with the best in parts for products
ouside HVAC unit
a pencil
Model # for Lennox HVAC unit
Plug your unit into it and play it loud
Because the drain is clogged.
To condense
Induction Unit
where is reset button on outside unit of American standard hvac where is reset button on outside unit of American standard hvac
There are many places where an individual can purchase spare parts to fix their HVAC equipment. There are many parts available online on Amazon or on eBay.
This question is a little vague, but I'll make by best attempt. I am assuming you mean a whole-house HVAC unit, and that you are concerned with a possible power surge so you want to shut the unit off at the thermostat. If this is correct, you need to know that the thermostat doesn't control the HVAC unit the way a switch controls a light fixture. As long as your HVAC breaker is on, you will have AC power at the HVAC unit. This usually includes at least a condenser unit outside and a blower either outside or inside. All the thermostat does is tell the HVAC components when to use the power applied and when to do nothing. The power does not flow through the thermostat to the HVAC like power through a switch to a light. Think of it this way: 'Off' on the thermostat doesn't mean power off. It means 'power available, but unit not running'. So, if you want to protect your HVAC from the potential of a power surge you will have to shut off the circuit breaker(s) feeding the HVAC components, not the thermostat.