I have a new Dayton Electric Heater 2yu65 that works fine but the contact switch inside the unit keeps clicking. I had the unit for 3 weeks now and it just started to click 3 days ago! What's going on?

A serial number is no good in such questions as it is just a numerical sequence of the number made. In your case number 5. The model number will get the fan.

https://www.google.com/search?q=Dayton+heater+fan

The motor number also doesn't help because that motor spindle can take a radial fan or a bladed fan.

https://www.google.com/search?q=fan+blade+for+motor+A0416B2810

Or you can contact Dayton direct

Garage Heaters ' Dayton Utility Area Heaters

http://www.daytonheatingandcooling.com > garage-hea...

Garage heaters designed specifically for warming car ports and enclosed utility areas are our specialty. We have a variety of units to help keep non-living .....

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yeah...it may be needing some colling device...

Contactor is bad or bad connection/low voltage to the control side of contactor . Too low of voltage can not pull the contacts together .

Try Grainger

dayton 2e440 heater Questions & Answers - Fixya

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... a Dayton Model 2YU40 electric heater Need manual for Dayton. ... looking for a replacement fan and fan motor for a Dayton model 2E454B electric wall heater.

Dayton rheostat fan motor Heaters Questions & Answers ...

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Dayton heaters rheostat fan motor related questions and answers. ... UP BUT FAN WONT KICK ON Could be one of several problems dependant on the model you have.... The motors are noisy in 2 Dayton 2e440 heaters. I ... I'm looking for a replacement fan and fan motor for a Dayton model 2E454B electric wall heater.

DAYTON Electric Wall Heater, Recessed or Surface ...

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W. W. GraingerShop DAYTON Electric Wall Heater, Recessed or Surface, Voltage 208/240, Watts ...Item # 3UG56; Mfr. Model # 3UG56; UNSPSC # 40101814; Catalog Page # 4277; Shipping Weight 20.65 lbs. ... Additional features include a built-in thermal cutout andfan delay switch for added safety ... Need Help Finding Repair Parts?

thermostat is out of adjustment grainger.com for repair parts.

Sounds like it has a bad fan switch wich is no more than a small circular bi-metal switch that expands when heated closing a switch. Get a parts breakdown off the net. I am sure you could find the switch in your area and replace it yourself.

you should not jump out high limits they are there to prevent fire .if it is opening there is a reason

if you will google the make and model number you should find a pdf owners/ service manual

the stat works using a bi metalic strip so that click you here is making a contact and telling the boiler to call for heating so if you getting no click you need a new room stat. Replace with same model and note the wiring most stats only use 2/3 wires depending on system

the air pressure is not correct on either units.the photo cell DOES NOT look for light any more,it count the light flashes.if the flame is not in the right possition the heater will shut down....after the unit ignites the ignitor is no longer used to keep the unit working,just the fuel that is being fed to the flame ball.that's why the pressure is so inportant.......