Most likely a bad ignition module. Most common problem for this engine.
A defective thermostat.
It could be the thermostat on the engine. If the engine does not warm up adequately the heater will never blow hot air.
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A vacuum leak is one possibility.
The engine will:Not warm up at all, This should set a code on the computerWill warm up very slowly, This should set a codeWill only warm up to a lower temperature than it should, this may not set a codeThe engine may warm up properly but continue to warm up until it overheatsThe engine may warm up until it is either at the correct temperature or too hot then cool down until it is too cold and repeat the cycle.All of these are symptoms of a bad thermostat.
Thermostat is stuck open. Replace it.
Your car has to achieve operating temperature before it functions as it should. Your heads which contain your valves are cold and don't move as easily as they do warm. This is why your thermostat doesn't open up until it reaches either 185 or 192 degrees. If you have a cold-blooded engine, you have to wait for it to warm up. You can quicken the process by revving the engine slightly. If your car is not cold-blooded, the best way to warm it up is by driving it. If your'e engine is taking a long time to warm up, your thermostat may stuck open, causing the antifreeze to cool the engine before it is even warm. Hope this helps
Most likely a defective thermostat.However,remember that there is a lot of metal in the engine block that has to heat up too.
add coolant.
Yes it is normal. That is the temperature that the engine was designed to operate.
Harley-Davidson Oil Pressure Specs for the Twin Cam Engine: Cold engine start-up: 44-50 psi. Warm engine at 2000 rpm and up: 30-38 psi. Warm engine at idle: at least 10 psi.