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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My name is ***** *****. the issue I'm having is with the

Customer Question

hi my name is ***** *****. the issue I'm having is with the honeywell thermostat pt #th6220d, when choosing the heat option the thermostat cycles no and off. but nothing comes on, em heat and a/c work fine.
JA: Thanks. Can you give me any more details about your issue?
Customer: when choosing the heat option the thermostat screen turns off and on with a clicking noise but the heat never comes on. em heat and a/c work fine
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Submitted: 10 months ago.
Category: HVAC
Expert:  airheatman replied 10 months ago.

Is this a new thermostat or did everything used to works as is?

Customer: replied 10 months ago.
Everything as is
Expert:  airheatman replied 10 months ago.

Ok do you have a C wire providing voltage or are you relying on batteries? And have you replaced batteries?

Customer: replied 10 months ago.
Ok yes it has a c wire but the batteries were dead... Replaced the batteries and heater came on but thermostat continued clicking till I turned it off.
Expert:  airheatman replied 10 months ago.

OK do you have a heat pump ?

Customer: replied 10 months ago.
If I leave in the heat position thermostat continues to click
Expert:  airheatman replied 10 months ago.

OK do you have a heat pump ?

Customer: replied 10 months ago.
I believe so
Expert:  airheatman replied 10 months ago.

Does the outdoor unit come on when you call for heat?

Customer: replied 10 months ago.
I apologize the heat does not come on... So no outside unit inop though I heard the attic unit come on but it was the dryer.
Expert:  airheatman replied 10 months ago.

OK remove front section of thermostat and tell me what wires are connected to what terminals.

Customer: replied 10 months ago.
Y2-blk, w2-wht, g-grn, w-orng, c-bl, y-y, r-r
Customer: replied 10 months ago.
There is a jumper wire from r to rc
Expert:  airheatman replied 10 months ago.

OK remove wires and connect Red green and yellow wires together and tell me if outdoor comes on and if air blowing in house is hot or cold

Customer: replied 10 months ago.
Remove all wires or only wires specified?
Expert:  airheatman replied 10 months ago.

Wires specified for now.

Customer: replied 10 months ago.
Ok well sparked pretty... Rear unit not on
Customer: replied 10 months ago.
Pretty good...
Expert:  airheatman replied 10 months ago.

Did we get heat or ac?

Customer: replied 10 months ago.
Attic unit came on for about 20sec
Expert:  airheatman replied 10 months ago.

Have to step away from desk for just a bit.Be back shortly. Did you leave the wires together?

Customer: replied 10 months ago.
just now separated
Customer: replied 10 months ago.
Think I might have blown a fuse or something cause nothing happens when I touch those wires together
Expert:  airheatman replied 10 months ago.

You did not let anything touch the blue C wire did you?

Customer: replied 10 months ago.
No not that I'm aware of
Expert:  airheatman replied 10 months ago.

OK if fuse blew you have a short in control circuit somewhere.

Red 1s 24v power.

Connecting red to green should energize fan relay

Connecting red and yellow should energize contactor in outdoor unit.

Customer: replied 10 months ago.
R&y connected nothing happens
Customer: replied 10 months ago.
R&g nothing
Expert:  airheatman replied 10 months ago.

Perhaps a wire touched c while removing .Look in air handler a small 3 amp auto type fuse.

http://i.imgur.com/kYe4Epz.png

http://i.imgur.com/90juVsc.png

Customer: replied 10 months ago.
There is a fuse but no circuit board and has been replaced before it has a 10 amp fuse instead of a 3 amp
Expert:  airheatman replied 10 months ago.

is fuse blown?

Customer: replied 10 months ago.
No
Expert:  airheatman replied 10 months ago.

OK do you have a meter to check between R and C at thermostat for 24 volts?

Customer: replied 10 months ago.
Unfortunately no
Expert:  airheatman replied 10 months ago.

You may have to get a meter next or call in a tech to see why we get nothing at thermostat

Customer: replied 10 months ago.
Ok something happened because now it doesn't work even on emergency heat
Customer: replied 10 months ago.
A/c inop too
Customer: replied 10 months ago.
Any techs you recommend in the Dallas area?
Customer: replied 10 months ago.
Because now there is no heat at all
Expert:  airheatman replied 10 months ago.

Best bet is going to be to grab a phone book and look for local heating and ac contractors to find nearest one .I am not from the area so not familiar with local companies.