Wifi issues - 4 storey townhouse with smart thermostat
I know very little about technology. I currently have a Linksys E1500 wireless router (Rogers internet) which is quite a few years old. I have the Lennox icomfort smart thermostat and it cannot keep a connection to wifi/internet. The thermostat is on the floor below where my router is and at the other end of the house. I note in many parts of the house my iphone and ipad only show 2 bars of signal. I am wondering if buying a wifi extender would help the smart thermostat stay connected to wifi or if I should buy a new router. Can anyone provide advice. Whatever device I should get will have to be easy for me to install. Thank you so much.