Do it Yourself HVAC
HVAC Troubleshooting
Would like to be able to change temperatures at my house with a smart phone or iPhone.
wifi thermostat

There is the perfect wifi thermostat to enable you to change the temps etc. from your i-phone, i-pad, smart phone or computer it is the color touch model T5800 which gives you all kinds of ability and in fact received Consumer reports highest rating of 96 out of 100 for thermostats.

You can change the room temp to any temp you want from any place in the world with your smart phone or a computer. You can set it up to send you an e-mail if the temperature in the house gets below or above any temp you set. You can look at any time to see what the weather forecast is for your house for the next 3 days what the high and low temperatures were for outside and inside your house and you can even trouble shoot your HVAC system to make sure everything is working correctly before you visit your house.

The thermostat will also send by e-mail and on your i-phone and/or computer service alerts when it is time to change filters, or have the unit serviced and you can send messages to the thermostat from your smart phone such as "I am going to be late for dinner". Finally you can look at how much energy you have used last week vs. this week or month over month and even compare the last 3 months energy use.

The WIFI thermostat installed by a qualified HVAC technician will run about $400.