I would start by verifying your water pump is operating. You could clamp a piece of clear hose in-line on one of the pipes and most likely verify this.
Attempt Grounding out your temperature sensor and verify if your gauge is working correctly, after doing this use an ohm-meter / Digital Multimeter and check the resistance of your sensor. the following would be normal findings based on temperature
Temp in °F Resistance (ohms)
212 ----------176
194 ----------240
176 ----------332
158 ----------458
140 ----------668
112 ----------972
122 ----------1182
104 ----------1458
95 -----------1800
86 -----------2238
76 -----------2795
68 -----------3520
58 -----------4450
50 -----------5670
40 -----------7280
32 -----------9420
if your findings are grossly out of line consider replacing the part; at $20-$30 it wouldn't be a bad rule-out anyway.
The water pump would answer the lack of heat however the sensor would not; on the passenger side of your vehicle under the hood there should be 2 hoses that reach go to/thru the firewall; with the vehicle running for approximately 5 minutes feel both hoses: if one of the hoses is warm/hot and the other is cold then you have a failed heater core $20-$35 for your vehicle will buy the replacement part. if both hoses are hot/warm then you have a failed temperature switch inside the vehicle (vehicle to vehicle this can be time consuming and vary in price); if both hoses are cold you have again verified your water pump has failed and should be replaced immediately.
Another consideration is verifying that all hoses from your previous repair remain uncrimped or folded.
I hope this information helps you; if it does please remember to mark it as the best answer.
