Problem is:Blower Fan Cycling Every 20 minutes for 30 seconds
This is even with the heat off(stat on A/C) and the pilot unlit.
I checked the limit switch, the point is on the pre-set mark,I moved it and saw the preset mark and put it back on it.
This is a 4 wire Cam Stat switch 7 inch.
It only has that one switch in the box.
The blower switch is only Continuous or Auto, no Intermittant.
The scenario for many years that I can remember is that the heat blows to temperature, shuts down then the fan would come on a few minutes after that for about 30 seconds, stop and that was it until it got cold and more heat was required.
I did change the pilot and thermocoupler because of it leaking and not wanting to light for a long time,that is working ok except for it sounding like it is blowing in the Wind all the time.
It there a Coil on the gas valve I can clean( I heard a guy say this but I think he was refering to the Evap on his A/C, He was refering to G10 also, there is probably a G10 A/C unit but I didn't check before posting.
I did take the switch out, checked it and made sure it was clean and not hung up, moved the metal strips a little, the 2 small bolts were not loose or backed off, the magic marker marks are still there and the strips look like they match up with them.
Before I took it out there the top screw was cocked up and not holding the top, the switch may have been off level and pointing upwards inside, I got it back in level and both screws correctly in.
It did work for hours(did not come on for like 4 or 5 hours then did the 30 seconds again) This is now with the Pilot lit, it was also doing the 30 seconds every 20 minutes with the Pilot Lit before I took it out.
It is not coming on for hours now instead of every 20 minutes.
Will just the pilot get enough heat up in too trigger the fan and or is it coming on every 5 hours for 30 seconds normal, I can't spend 150 for this switch it is going to do the same thing.
Thanks if you can help.